Extracolonic findings and radiation at CT colonography: what the referring provider needs to know
- 6 Downloads
A better understanding of the risks and benefits of extracolonic findings and radiation dose will aid in the safe and proper implementation of CT colonography in clinical practice. The majority of extracolonic findings in screening patients are benign and can be ignored by referring physicians. Radiologists also need to be responsible in reporting extracolonic findings. Referring providers must be knowledgeable about the theoretic risks and controversies regarding the use of ionizing radiation. Screening CT colonography imparts a low-level of radiation to patients that is equivalent or less than annual background dose.
KeywordsCT CT colonography Colorectal cancer Radiation dose Iterative reconstruction Extracolonic
Compliance with ethical standards
No funding was provided for this manuscript.
Conflict of interest
Judy Yee, MD, FACR has received research Grants from Echopixel and Philips. Elizabeth McFarland, MD is a member of the Medical Advisory Board for Vital Images.
This article does not contain any studies with human participants or animals performed by any of the authors.
For this type of study, formal consent is not required.
- 3.Levin B, Lieberman DA, McFarland B, et al. (2008) Screening and surveillance for the early detection of colorectal cancer and adenomatous polyps, 2008: a joint guideline from the American Cancer Society, the US Multi-Society Task Force on Colorectal Cancer, and the American College of Radiology. CA Cancer J Clin. 58:130–160CrossRefPubMedGoogle Scholar
- 25.Khan KY, Xiong T, McCafferty I, et al. (2007) Frequency and impact of extracolonic findings detected at computed tomographic colonography in a symptomatic patient. Br J Radiol 94:355–361Google Scholar
- 43.Radiation Control: Health Facilities and Clinics, SB1237, February 19, 2010. http://www.leginfo.ca.gov/pub/09-10/bill/sen/sb_12011250/sb1237bill_20100929chaptered.html.
- 44.Radiation Dose in X-Ray and CT Exams. Effective radiation dose in adults. https://www.radiologyinfo.org/en/info.cfm?pg=safety-xray.
- 45.Health Physics Society (2016) Radiation risk in perspective. Position Statement of the Health Physics Society. http://hps.org/documents/risk_ps010-3.pdf.
- 46.American Association of Physicists in Medicine (2017) Position statement on radiation risks from medical imaging procedures. http://www.aapm.org/org/policies/details.asp?id=318&type=PP¤t=true.
- 52.AAPM Report No. 96: the measurement, reporting, and management of radiation dose in CT. (2008). https://www.aapm.org/pubs/reports/RPT_96.pdf.
- 54.ACR-SAR-SCBT-MR practice parameter for the performance of computed tomography (CT) colonography in adults. https://www.acr.org/~/media/ACR/Documents/PGTS/guidelines/CT_Colonography.pdf.
- 66.Fletcher JG, Grant KL, Fidler JL, et al. (2012) Validation of dual-source single-tube reconstruction as a method to obtain half-dose images to evaluate radiation dose and noise reduction: phantom and human assessment using CT colonography and sinogram-affirmed iterative reconstruction (SAFIRE). J Comput Assist Tomogr 36:560–569CrossRefPubMedGoogle Scholar
- 69.Lambert L, Ourednicek P, Jahoda J, et al. (1048) Model-based vs hybrid iterative reconstruction technique in ultralow-dose submillisievert CT colonography. Br J Radiol 2015(88):20140667Google Scholar