Revision History



Important: All items in bold in the Technique Parameters and Anatomic Coverage sections below are required to successfully achieve accreditation. CTDIvol information is required for each study. Either include a screen save of the dose with the images, or enter the dose as displayed by the scanner in the Clinical Test Image Data Sheet. Please be aware, special attention must be paid to scanner output (CTDIvol) for pediatric studies. The facility will not receive a pass if the radiation dose is perceived to be too high, regardless of whether the rest of the CT study conforms to satisfactory criteria.


It is important for reviewers to be aware that there may be significant differences between the dose estimates reported by some CT scanners for pediatric scans based on which phantom size (16 or 32 cm diameter) is used to report the CTDIvol values in the dose report. Though the manufacturers are converging on a standard for pediatric abdomen exams being reported with the 32 cm (body) CTDI phantom only, there are still differences between manufacturers in the existing installed base of scanners. The difference between reporting dose to a 32 cm diameter phantom to that of a 16 cm diameter phantom for the same scanner output can be a factor of 2 to 2.5 (lower when the 32 cm phantom is used). Therefore, reviewers are asked to pay special attention to the phantom size used in reporting CTDIvol on the scanner for pediatric abdomens.


Pediatric Abdomen

Technique Parameters

Required Series

IV Contrast Enhanced

Reconstructed Slice Width

≤ 5 mm

Reconstruction Algorithm

Standard or soft tissue (or appropriate body kernel)

Oral Contrast

Oral contrast material must be present with barium or neutral (water) contrast agents

CTDIvol

Reference value: 15 mGy; Pass/Fail criteria: 20 mGy (As reported by the scanner using a 16 cm phantom. If scanner reports values using a 32 cm phantom, then approximate limits would be 7.5 mGy and 10 mGy. The CTDIvol is based on a 40-50 lb. patient size.)

Anatomical Coverage

Coverage

Diaphragm through the iliac crest  

Pediatric Adrenal or Renal

Technique Parameters

Required Series    

IV contrast enhanced 

Reconstructed Slice Width

≤ 3 mm 

Reconstruction Algorithm

Standard or soft tissue (or appropriate body kernel) 

Oral Contrast    

Not required

CTDIvol    

There are no reference values for this examination

Anatomical Coverage

Coverage

Extend just above the diaphragm to the iliac crest or inferior extent of the kidneys



Revision History for this Article

Date

Section

Description of Revision(s)

12-12-19

All

Article created; FAQs incorporated; No criteria changes

3-6-2020
Pediatric Abdomen
Added (water) to neutral contrast agents




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