m:8G1j NOx/4n O i8sp?X&{`Ec{qr%R2Tto]^8_gYQ*.Ivp+kZ1/z`y@"6}Y&$4Ps0kRu$!IQK1q{%zu4Pm?= ha^Vv&T(`(kqi!RXa&_$/6,YpCA=gbxhWfD7=X9nB[0\c?. > MRI CPT Codes Call 855-SAFE-RAD to schedule adenine roentgenology take. 2 0 obj An important component of adrenal MRI protocol is chemical shift imaging (CSI). 74185. allergy) and time constraints. For indeterminate renal masses, the field of view can be restricted to the kidneys only, with precontrast and nephrographic (obtained at 100-second to 120-second delay) phases considered essential for this indication. American Hospital Association ("AHA"), Appropriate Use Criteria (AUC) in Coding, Reimbursement, and Clinical Practice. Reference article, Radiopaedia.org (Accessed on 01 May 2023) https://doi.org/10.53347/rID-94873, View Raymond Chieng's current disclosures, see full revision history and disclosures, iodinated contrast-induced thyrotoxicosis, saline flush during contrast administration, CT NCAP (neck, chest, abdomen and pelvis), CT angiography of the cerebral arteries (protocol), CT angiography of the circle of Willis (protocol), cardiac CT (prospective high-pitch acquisition), CT transcatheter aortic valve implantation planning (protocol), CT colonography reporting and data system, CT kidneys, ureters and bladder (protocol), CT angiography of the splanchnic vessels (protocol). 8 ); therefore, tumor contrast enhancement is more conspicuous on the nephrographic phase compared with the earlier corticomedullary phase. MRI Abdomen Protocol - Adrenal Reviewed By: Brett Mollard, MD; Anna Ellermeier, MD Last Reviewed: July 2018 Contact: (866) 761-4200 Standard uses: Evaluate indeterminate adrenal lesions for the presence of intracellular lipid (indicative of benignity). 1. Ferromagnetic surgical clips or staples s%xPL$WJ? Ask the patient to undress and change into a hospital gown Spinal MRI (mass in the spinal canal at the T12-S3 level) 11 November 2020: . $_ @'a7H\?/ mWI (IMG 2390) - fMRI (Functional MRI w/ Tractography) CPT Codes 70551 & 76377 . hb```f``e`e`cd@ A(G x{LonCI%[p]W-m=J;::*$. > For the assessment of benign renal lesions (e.g. endobj Contrast-enhanced ultrasound is discussed in detail in a separate chapter. Instruct the patient to hold their breath during image acquisition. > NB: This article is intended to outline some general principles of protocol design. Arterial phase (approximately 30-second delay) with field of view focused on the kidneys is recommended to better depict arteries and their relationship to the renal tumor. For others, it may consist of a corticomedullary phase (40-60 second delay) and/or an excretory phase (5-10 minute delay). 2004;24(2):e20. Protocol 1 Indications: Indeterminate renal mass Recommended scan series: Pre-contrast: kidneys only, axial, 3mm reconstruction section thickness with or without 50% overlap Nephrographic phase: kidneys only, axial, 3mm reconstruction section thickness with or without 50% overlap, at 100-120 second delay Optional additional scan series: Renal mass (cyst or solid) Transitional cell carcinoma of kidney Abnormal findings mri aBdomen: Adrenal MRI Abdomen with and without contrast 74183 Adrenal mass or lesion Hypertension Pheochromocytoma Determined by Radiologist Body mrcP: Biliary MRI Abdomen with and without contrast 74183 Abdominal pain Jaundice Centre the laser beam localiser over the level of lower intercostal border (i.e. Those that are homogeneous with HU greater than 70 are hemorrhagic or proteinaceous cysts ( Fig. Diphenhydramine (Benadryl) (optional): 50 mg PO to be taken 1 hour prior to exam. 1, 2 Many of these are 4 cm or less in diameter (clinical stage T1a) and termed small renal masses (SRMs). (, Presurgical planning CT in a 65-year-old man with a left renal tumor. [B]MRI Extremity - Joint/Nonjoint[/B] (, Suggested computed tomography protocols from the Society of Abdominal Radiology Disease-focused panel on renal cell carcinoma. Most adrenal masses are detected first on abdominal CT scans, with an incidence of 0.6 to 1.3 percent on such scans. > Trigger & track. MR imaging serves as a problem-solving tool in renal mass evaluation, and MR imaging protocols should take advantage of its multiparametric capability to provide additional information for renal mass characterization. Better depict the relationship between the collecting system and the mass. Precontrast CT provides better detection of small amounts of intralesional fat compared with postcontrast CT ( Fig. This phase is helpful for identifying RCC involvement of the collecting system as well as diagnosing primary malignancy arising from the collecting system, such as urothelial carcinoma involving the kidney ( Fig. View matching HCPCS Level II codes and their definitions. Metallic foreign body in the eye Contrast material is excreted into the renal collection system, ureters, and bladder in this phase, allowing better visualization of these structures. 0000008503 00000 n T2 tse breath hold (TRUFI or HASTE)coronal 4mm, Plan the coronal slices on the axial plane; angle the position block parallel to the mid line along the right and left kidneys. If the patient has a MRI [U]Joint[/U] you can code [B]multiple[/B] studies [U](Upper: 73221-73223) (Lower: 73721-73723). Securely tighten the body coil using straps to prevent respiratory artefacts Slices must be sufficient to cover both kidneys from two slices above the upper pole of kidney down to two slices below the lower pole of kidney. However, this article will cover the optional,corticomedullary phase too. h0 `UP i@`hhXXfrh%3.b+%|s?lpz@/a'A"VvCzl< New HCPCS Level II modifier reports advanced diagnostic imaging provided to Medicare patients. Renal Mass Characterization/Surgical Planning (if in conjunction with Pelvis CT w/contrast CPT Code 74178, IMG 783) Pancreatic mass characterization/surgical planning (if in conjunction . The widespread use of cross-sectional imaging has led to a continuous increase in the number of incidentally detected indeterminate renal masses. Ensure kidneys are well-centered in coil to ensure good signal at dome. Axial (, CT in a 75-year-old woman with a left renal lesion demonstrating higher lesion conspicuity in the nephrographic phase compared with the corticomedullary phase. X:/QEZfG This modality enables the radiologist to detect intra-tumor fat resulting in a loss of signal intensity. (attn kidney) 74183 Renal mass or complex cyst CT Abdomen . 125 0 obj <>stream /1 G,G5?I7 JJW1iXC2wH(5Rm>^'cxTI YDLN!{4]. xref Therenal mass CT protocol is a multi-phasic contrast-enhanced examination for the assessment of renal masses. trailer C`:+y(B^\}iO`,;6yg9&Mlc. q-5GXRR{uj[qma..v.Q Dj QcU)0M'(_5Acc:4A1g59{P ClWk38?l4 VL K;~ZDm*HI(cCccsFGZvcW |w`90nT`GaGX -mY Q#x\G)!oMZJ,BCd3s HYmVgU*# n(7g(m SeH+ZFZ l5nbsOY>p]9;? Check before giving contrast. In this diagnostic procedure, the provider performs magnetic resonance imaging of a lower extremity joint without using contrast material. More CPT Codes: MRI | Nuclear Medicine | PET/CT | PET/MR | Ultrasound, Prep: NPO 2 hours for all studies w/ contrastArrival time: 30 minutes prior to exam for registration and prep, Dissection (if in conjunction with Abdomen and Pelvis CT w/contrast please see Chest w/ and w/o contrast and Abdomen Pelvis w/contrast (CPT Code 74177, IMG 698). Angiomyolipomas (AMLs) can be diagnosed confidently once intralesional macroscopic fat has been identified in the absence of other worrisome findings, such as intralesional calcification. A three plane TrueFISP localiser must be taken initially to localise and plan the sequences. 0000004668 00000 n hoHaBRtMd0)iC{$;;] p%@;N)pWPMHsBi\sC: cRxoAYU&%o>tLT0* &AQCI>u. y;?5Zr|e~fhlw`m@b]z"tKp+#14^w]^wwt22*Z#OlA?rv1HDXM\m w`,3UE~^X_~1E1(S8lyLV7qL6D"98%eM-r!zU An appropriate angle must be given in the sagittal plane (perpendicular to the long axis of kidney). endstream endobj 98 0 obj <>]/Pages 89 0 R/Type/Catalog>> endobj 99 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/TrimBox[0.0 0.0 612.0 396.0]/Type/Page>> endobj 100 0 obj <> endobj 101 0 obj <>stream 0 Slices must be sufficient to cover both kidneys from two slices above the upper pole of kidneys down to two slices below the lower pole of kidney. Check for errors and try again. MRA carotid w/o contrast. During this phase, there is intense enhancement of the renal cortex, allowing differentiation between the cortex and the medulla. Measurement of HU change after contrast administration using the earlier corticomedullary phase in a papillary RCC may result in erroneous categorization of the lesion as a nonenhancing cyst (see Fig. For clinical responsibility, terminology, tips and additional info start codify free trial. Charge as: Abdomen W/WO `|G]&s 4 0 obj 0000008946 00000 n Nephrographic phase is the most sensitive for detecting renal lesions. ?,)NA Unable to process the form. Hematuria (CT Urogram, CT IVP) CT Hematuria Protocol CT/IVP w & wo 74178 MRI Abdomen and Pelvis w . 0000009361 00000 n Give 2L O2 if it will help with breath-holdsUNLESS PATIENT HAS COPD OR ANOTHER REASON NOT TO GIVE O2. ), T1 In-opposed phase breath hold axial 4mm. CT Abdomen with contrast (CPT 74160) or without and with contrast (CPT 74170) with suspicion of a solid organ lesion (liver, kidney, pancreas, spleen). 72146, 74141 72148. The purpose of this exam is to assess the location and composition of a renal mass. 0000002341 00000 n <<9D26B84D59B5D04CBD15A8A60877983D>]/Prev 685671>> Contrast injection risk and benefits must be explained to the patient before the scan Note: Instruct patient to arrive 45 minutes prior to exam for registration and prep. The corticomedullary and excretory phases together with the precontrast-phase and nephrographic-phase images may be helpful to subtype renal masses. endobj By applying enhancement thresholds, 1 study has shown that 4-phase CT attenuation profiles enabled differentiation of clear cell RCCs from other solid renal cortical masses, notably from papillary RCCs and lipid-poor AMLs. Call 855-SAFE-RAD to schedule a radiology exam. MRI EXAM CPT CODE REFERENCE Use this reference to quickly determine the correct exam for your patients based on the indications described herein and the . Renal masses increasingly are found incidentally during work-up for nonrenal indications, largely due to the frequent use of medical imaging. Check the positioning block in the other two planes. ydm7!d~!T. These 2 phases allow the differentiation between solid and cystic renal masses. > Hematuria, > Tumor/Mass/Cancer/Mets Note: MRI is more sensitive Yes ortho CT Extremity without contrast Upper Extremity Lower Extremity 73200 . <> Appt Reason CPT CodeCPT CodeCPT CodeCPT Code 11801 SW 90 Street Suite 102 Miami FL 33186 Tel: 305/270-6001 Fax: 305/270-6955 MRI Chest and Left Scapula W/O&W/Contrast 71552 73220 A9579 . Although the specifics of a renal protocol CT vary by institutions, the following phases in their various combinations commonly are used: precontrast phase, corticomedullary phase, nephrographic phase, and excretory phase ( Fig. Instruct the patient to keep still , Suggested IV contrast type by the SAR DFP is low-osmolar or iso-osmolar contrast material, at a dose of 35 g to 52.5g iodine equivalent (ie, for contrast material that contains 350mg of iodine/mL, the corresponding dose is 100150mL), or weight-based dosing. 44 0 obj <> endobj Current Procedural Terminology CPT 2022 MAGNETIC RESONANCE IMAGING - MRI COMPUTED TOMOGRAPHY - CT MAGNETIC RESONANCE ANGIOGRAHY - MRA MAGNETIC RESONANCE VENOGRAPHY - MRV . Instruct the patient to hold their breath for the breath hold scans (its better to coach the patient two to three times before starting the scan) 1 ) 99% of the time. MRI renal mass protocol v1.0 Society of Abdominal Radiology Disease Focused Panel on Renal Cell Carcinoma Zhen Jane Wang, MD, Project Leader Matthew S. Davenport, MD, Co-Chair Stuart G. Silverman, MD, Co-Chair Hersh Chandarana, MD Ankur Doshi, MD Gary M. Israel, MD John R. Leyendecker, MD Ivan Pedrosa, MD, PhD Steve Raman, MD Erick M. Remer, MD , Although multiphase CT for tumor subtyping is promising, there are no prospective studies to date that have validated the reported enhancement threshold. At the time the article was last revised Raymond Chieng had > > endstream endobj 45 0 obj <> endobj 46 0 obj <> endobj 47 0 obj <>stream 66 0 obj <>/Filter/FlateDecode/ID[]/Index[44 37]/Info 43 0 R/Length 103/Prev 145237/Root 45 0 R/Size 81/Type/XRef/W[1 2 1]>>stream Our radiologists work closely with OHSU MRI technologists in the art of creating optimal images using current technology. The code(s) have to match the requesting provider's order, which looks to be an "MRI RT FOOT". > carcinoma) Note: This article is intended to outline some general principles of protocol design. The renal mass CT protocol is a multi-phasic contrast-enhanced examination for the assessment of renal masses. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Google+ (Opens in new window), on Protocol Optimization for Renal Mass Detection and Characterization, Added Value of Magnetic Resonance Imaging for the Evaluation of Mediastinal Lesions, Clinical Review of Computed Tomography and MR Perfusion Imaging in Neuro-Oncology, Radiologic Clinics of North America Volume 58 Issue 5, May be helpful to differentiate urothelial cancer from RCC and parapelvic or peripelvic cysts from hydronephrosis and to diagnose calyceal diverticula, Prepartial nephrectomy or preablation planning for renal masses that have been previously completely characterized, Better depict the arteries and their relationship to the renal mass. 2 AD). An appropriate angle must be given in the sagittal plane (parallel to the long axis of kidney). Premedication Protocol. of localised blastemal-type Wilms tumour patients treated according to intensified treatment in the SIOP WT 2001 protocol, a report of the SIOP Renal Tumour Study Group (SIOP-RTSG). CT protocols should be tailored to different clinical indications, balancing diagnostic accuracy and radiation exposure. 0000025763 00000 n BODY PART REASON FOR EXAM PROCEDURE NOTES CPT CODE HEAD AND NECK Sella/Pituitary Pituitary dysfunction Adenoma, Sellar or suprasellar mass MRI HEAD W AND W/O CONTRAST (UMC order appears as MRI BRAIN W AND W/O CONTRAST) 70553 Inner Ear (IAC) CPA tumor CPT Code 74170. Indeterminate renal mass, renal adenocarcinoma, metastasis, monitoring of known renal mass. Optimized imaging protocols enable analysis of imaging features that help narrow the differential diagnoses and guide management in patients with renal masses. It is most often comprised of a non-contrast, nephrogenic phase and excretory phase. Gadolinium should only be given to the patient if GFR is > 30 Position the patient over the spine coil and place the body coil over the abdomen (xiphoid process down to anterior superior iliac spine) Excretory phase is obtained at 7 minutes to 10minutes after IV contrast injection. 0000002227 00000 n With and without Abdomen Only (Pancreatic Protocol) Thirty patients undergoing four-phase renal CT scans for assessment of renal lesions (>10 mm) were included in the study. Contrast injection risk and benefits must be explained to the patient before the scan, T2 tse breath hold (TRUFI or HASTE)coronal, Use T1 VIBE fat sat axial and coronal after the administration of IV, CLICK THE SEQUENCES BELOW TO CHECK THE SCANS. Lung Nodules (may be done w/contrast if ordering MD desires), Pneumonia (may be done w/contrast if ordering MD desires), Pleural effusion (may be done w/contrast if ordering MD desires), Airway imaging (includes TBM), Tracheal stenosis, Tracheal malacia (Tracheal Tree), Redo sternotomy for patients who cannot have contrast, Aortic or mitral valve for patients who cannot have contrast, Lung Cancer (may be done w/o Contrast if ordering MD desires), Chest Pain (may be done w/o contrast if ordering MD desires), Liver Mass Characterization/Surgical Planning, Post treatment HCC (not for metastatic surveillance), Renal Mass Characterization/Surgical Planning (if in conjunction with Pelvis CT w/contrast CPT Code 74178, IMG 783), Pancreatic mass characterization/surgical planning (if in conjunction with Pelvis CT w/contrast CPT Code 74178, IMG 783), Liver chemo embolization or RFA (if in conjunction with Pelvis CT w/ contrast CPT Code 74178, IMG 783), Abdomen and pelvis patients who cannot have contrast, Pre- and post-endoluminal grafting for patients who cannot have contrast, Diverticulitis/appendicitis/abscess/acute pancreatitis, Any other indication that is not already listed, Pre liver transplant/portal vein embolization, Gated TAVI (if in conjunction with Heart CT w/contrast (Morphology), CPT code 75572, IMG 7603), Malignancy staging/malignancy follow-up angiography, Failed colonoscopy (if with IV contrast, CPT Code 74262, IMG 2251), Patients that cannot be sedated or cannot stop blood thinners for conventional colonoscopy (if with IV contrast, CPT Code 74262, IMG 2251), Hematuria (if w/o 3D reconstructions, CPT Code 74178, IMG 2252), CT AIF/bypass evaluation/cold leg/leg ischemia, Coronary artery disease/Bypass graft evaluation, Neck mass/malignancy staging/malignancy follow (if contrast is not desired, w/o contrast CPT Code 70490, IMG 191), Acute or chronic sinusitis/nasal cavity polyps, Trauma/black eye/facial contusion/jaw injury, Facial weakness/neoplasm/malignancy/cellulitis/abscess, Intracranial aneurysm/stenosis/dissection, Subarachnoid hemorrhage (SAH)/Arteriovenous malformation (AVM), Extracranial aneurysm/stenosis/dissection, Problem cases unresolved by non-invasive imaging, Cervical myelopathy or radiculopathy in which fine bone detail is desired, Thoracic myelopathy or radiculopathy in which fine bone detail is desired, Lumbar radiculopathy in which fine bone detail is desired presurgical planning and mapping, Infection (if concern for septic joint should be aspirated prior to CT), Rotator cuff or labral injury, unable to get MRI, Triangular fibrocartilage (TFC) complex injury. >, A satisfactory written consent form must be taken from the patient before entering the scanner room Patient came in with rt foot pain and swel [b]MRI Extremity - Joint/Nonjoint[/b] An appropriate angle must be given in the sagittal plane (perpendicular to the long axis of kidney). <>>> Computed tomography (CT) and MR imaging are mainstays for renal mass characterization, presurgical planning of renal tumors, and surveillance after surgery or systemic therapy for advanced renal cell carcinomas. Note: NPO 4 hours. %PDF-1.5 The specifics will vary depending on CT hardware and software, radiologists' and referrers' preference, institutional protocols, patient factors (e.g. If possible provide a chaperone for claustrophobic patients (e.g. JN Sheth S & Fishman E. Multi-Detector Row CT of the Kidneys and Urinary Tract: Techniques and Applications in the Diagnosis of Benign Diseases. %%EOF a,qN*)[6%Tz\ mv9xBFk$K/c1?gz3?t{A#!=)01ST`ipFY{\1>c$&34pR ?@Q6/g_1%H5zY^wm@2>^K~oY!QEm.f2Gw;rty^W=D *l !%/"2vGVc>|~{OmL tR7tH]VVB 50A'1|e8 oD}tw.. Despite aggressive treatment in early stages of the disease, a clear positive effect in reducing kidney cancer-specific mortality is . CNobM*KUfBC*w3!Nh!R=: jq`?xL_,NI{F1&p=P;e! Multiplanar reformats in the coronal and sagittal planes of each postcontrast scan series also can be done with 3-mm reconstruction section thickness without overlap. The group has suggested standardized CT protocols for renal mass evaluation based on different clinical indications, as described later. INTRODUCTION. PelviS: renal STone ProToCol . Power inject 2mL/sec. Monitor that patient is breath-holding. In contrast, papillary RCCs demonstrate greater enhancement at later phases. 6 ) or identify vascular anomalies, such as pseudoaneurysm and arteriovenous fistula. 0000000016 00000 n May be separated into overlapping stacks if patient cannot breath-hold. %PDF-1.3 % bYBqbQ-)(?x%r0810 RmGT3rqYDRMTGhNnjU}}LEe/yo9Q4p K_c_~(Q )2#q|$3OM"QeX 5zCcob]v361+pgsL}NCs{cD*9&#B:C)81h}\|/|-bUu 5|r. Coil: Torso Coil. > For the assessment of the inferior vena cava in patients with known solid renal tumour MRI spine screening to include 3 separate. <>/ExtGState<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/Annots[ 14 0 R 15 0 R] /MediaBox[ 0 0 792 612] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> For FREE Trial. For these masses, no further imaging is indicated. no financial relationships to ineligible companies to disclose. The specifics will vary depending on MRI hardware and software, radiologist's and referrer's preference, institutional protocols . hb```b``)a`e``ld`@ 4">kvv6*g^.i#wVz7_[/P=6w,t9ijtOT ~+IbInz/?^zPY\ w 2014;202(6):1196-206. MRI Kidneys and Renal Arteries W/O & W/Contrast 74183 74185 A9579 MRI Kidneys W/O & W/Contrast 74183 A9579 MR imaging protocols should take advantage of the improved soft tissue contrast for renal tumor diagnosis and staging. Imaging is essential in renal mass characterization in order to guide appropriate treatment selections, because the management paradigm of localized renal tumors has evolved in recent years to include active surveillance and thermal ablation in addition to partial and radical nephrectomy. [/U] 0000005493 00000 n (In our department we instruct the patients to breathe in and out twice before the breathe in and hold instruction. IV contrast material type, volume, and injection rate: type, low-osmolar or iso-osmolar contrast material; volume, 35-g to 52.5-g iodine equivalent (ie, for contrast material that contains 350mg of iodine/mL, the corresponding dose is 100150mL); and weight-based dosing injection rate, 25mL/s. View any code changes for 2023 as well as historical information on code creation and revision. Some masses can be confidently characterized on these images without requiring a subsequent dedicated multiphase renal protocol CT or MR image. stream On the other hand, the presence of intralesional calcification, regardless of the presence of fat, should prompt suspicion for malignancy, such as RCC. The excretory phase may be helpful for distinguishing urothelial cancers from RCCs and parapelvic or peripelvic cysts from hydronephrosis and for diagnosing calyceal diverticula. 0000013275 00000 n endobj Computed tomography (CT) and MR imaging with intravenous (IV) contrast are the mainstays of renal mass evaluation. H= {,# $9N2)vELLc# qTxPec%={nv.lU'V{sMR7v';c9c%F. AJR Am J Roentgenol. Do not interleave images. Check the positioning block in the other two planes. Check the positioning block in the other two planes. If the patient has a MRI [U]Joint[/U] you can code [B]multiple[/B] studies [U](Upper: 73221-73223) (Lower: 73721- Hello, trying to get some help on understanding the use of modifier 26. Breathe the patient slowly so they have time to follow instructions. Many institutions will perform this around 5 minutes to demonstrate opacification of the ureters, mid-diaphragm to the iliac crest (covering kidneys), mid-diaphragm to the iliac crest (covering kidneys), contrast injection considerations (bolus tracking), level of the diaphragmatic hiatus or first lumbar vertebra at the aorta, 100 mL of non-ionic contrastat 3 to 5 mL/s (a higher flow rate will equal greater enhancement), 20-30 seconds post bolus trigger (30-40 s after injection), mid-diagram to lesser trochanter (covering entire renal system), pseudoenhancement, an artifact encountered where the calculated density of a lesion is inaccurately increased, is a problem often noted in renal mass scans,dual-energy CT via virtual monoenergetic images at a KeV range of 80 Kev to 90 KeV can minimize beam hardeningand partial volumingand overcome this issue, Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Plan the axial slices on the coronal plane; angle the position block parallel to the right and left renal pelvis. Minimize SENSE if there is mottling in the center of the image. MRA carotid with contrast. endstream endobj 103 0 obj <>stream . Minimize SENSE if there is mottling in the center of the image. Scanner preference: 1.5T. 0.2 mL/kg in adults, children and infants. Radiographics. cardiac pacemaker, insulin pump biostimulator, neurostimulator, cochlear implant, and hearing aids) Intracranial aneurysm clips (unless made of titanium) For active surveillance, postablation surveillance, or postpartial nephrectomy surveillance, precontrast and nephrographic phases should be obtained.
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