INDICATIONS: Renal Mass, Renal Cancer

CT RENAL MASS

INDICATIONS: Renal mass, renal cancer

(If reason for exam is CryoAblation, Embolization, Clear Cell Carcinoma, or Living Related Donor use“RENAL WITH ARTERIAL” Protocol)

PATIENT PREP: NPOfor solid foods, water only, for 4 hours prior to scan

IV CONTRAST: Perform as directed by the supervising radiologist

100mL Isovue 370 @ 2-3mL/second

ORAL CONTRAST: 32 oz Water 30 Minutes Prior to Scan, and 12 oz Water Immediately Prior to Scan.

POSITIONING: Feet First Supine, Arms above head

TOPOGRAMS: AP. Range: Dome of diaphragm through iliac crest/through kidneys. 35 mA, 120 kV.

SCAN TYPE: Spiral/Helical

NOTES: ALARA – Keep radiation dose As Low As Reasonably Achievable.

NONCONTRAST

NEPHROGRAPHIC PHASE

Scan
Range / Scan
Direction / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Quality
Reference
mAs / CARE
kV / Quality
Reference
kV / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed:
(mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Dome of Diaphragm
to Iliac Crest/
Through Kidneys / Craniocaudal / Suspended
Inspiration / 100
Seconds / ON / 120 / ON / 120 / Detectors: 64 x 0.6 mm
Slices Per Tube Rotation: 32 / Pitch: 0.8
Table Increment/Speed:
15.36 mm/rotation / 0.5
Seconds / 50
cm
Plane / SAFIRE
Strength / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON / Axial / ON
3 / 3.0 mm / 3.0 mm / I40f
Medium / Abdomen
300/40 / FOV just beyond
patient’s body
RECON / Axial / ON
2 / 3.0 mm / 3.0 mm / I70f
Very Sharp ASA / Lung
1200/-600 / FOV just beyond
patient’s body
RECON
Coronals Angled in Plane to Body Part / Coronals Angled in Plane to Body Part
Recon Card 3D Coronal MPR / ON
3 / 3.0 mm / 3.0 mm / I40f
Medium / Abdomen
300/40 / FOV just beyond
patient’s body
RECON
Sagittals Angled in Plane to Body Part / Sagittals Angled in Plane to Body Part
Recon Card 3D Sagittal MPR / ON
3 / 3.0 mm / 3.0 mm / I40f
Medium / Abdomen
300/40 / FOV just beyond
patient’s body

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PYELOGRAPHIC PHASE

Scan
Range / Scan
Direction / Respiration / Scan
Delay
(Seconds) / CARE
DOSE
4D / Quality
Reference
mAs / CARE
kV / Quality
Reference
kV / Detector Configuration
Slices Per Tube Rotation / Pitch
Table Increment/Speed:
(mm/rotation) / Rotation
Time
(Seconds) / SFOV
(cm)
Dome of Diaphragm
to Iliac Crest/
Through Kidneys / Craniocaudal / Suspended
Inspiration / 6 Minutes From
Start of Injection.
(Approximately 250 Seconds From End of Nephrographic) / ON / 120 / ON / 120 / Detectors: 64 x 0.6 mm
Slices Per Tube Rotation: 32 / Pitch: 0.8
Table Increment/Speed:
15.36 mm/rotation / 0.5
Seconds / 50
cm
Plane / SAFIRE
Strength / Slice
Thickness / Interval / Kernal / Window
Width/Level / DFOV
(cm)
RECON / Axial / ON
3 / 3.0 mm / 3.0 mm / I40f
Medium / Abdomen
300/40 / FOV just beyond
patient’s body
Approximate Values for CTDIvol
Patient Size / Weight (kg) / Weight (lbs) / CTDIvol (mGy)
Small / 50-70 / 110-155 / 10-17
Average / 70-90 / 155-200 / 15-25
Large / 90-120 / 200-265 / 22-35
Reference: AAPM

Allowed CTDIvol Dose Ranges:7 mGy – 50 mGy

XR29 Dose Notification Value (CTDIvol):50 mGy

*The AAPM recommended NEMA XR29 Dose Notification Value for an adult torso is 50 mGy. Dose notification levels less than the AAPM recommended can be set. The maximum CTDIvol should match the dose notification value. Exams with CTDIvol values less than the minimum allowed range should not be performed unless approved by a radiologist.

CHARGES:CABDWWO or CKIDWWO

NETWORK:Exam to PACS

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