Abstract
Computed tomography (CT) is a valuable tool for performing certain image-guided interventions. The availability of axial images and the excellent contrast afforded by CT allows for accurate targeting of lesions. However, along with the many benefits of CT come certain risks, mainly those related to radiation exposure. Stray radiation is much more intense in CT labs compared to interventional labs and is at times directed towards the face and eyes of the physician. Patient exposure rates are often higher in CT-guided interventions than in fluoroscopically guided interventions. Therefore, adequate radiation protection is a key element of successful CT-guided procedures. The goal is to minimize the risk for both stochastic and tissue effects from radiation for both patient and operator.
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Notes
- 1.
The computed tomography dose index (CTDI) can be measured in several ways. CTDI100 refers to the dose measured in an acrylic phantom using a 100 mm ionization chamber during a single axial scan. CTDIvol is a calculated quantity equal to 1/3 × CTDI100 measured along the central axis of the phantom plus 2/3 × CTDI100 measured along the peripheral axis of the phantom, 1 cm below the surface. Modern CT scanners display the CTDIvol on the scan console.
References
Lucas PA, Dance DR, Castellano IA, Vano E. Estimation of the peak entrance surface air kerma for patients undergoing computed tomography-guided procedures. Radiat Prot Dosimetry. 2005;114:317–20.
Leng S, Christner JA, Carlson SK, Jacobsen M, Vrieze TJ, Atwell TD, McCollough CH. Radiation dose levels for interventional CT procedures. Am J Roentgenol. 2011;197:W97–103.
Nawfel RD, Judy PF, Silverman SG, Hooton S, Tuncali K, Adams DF. Patient and personnel exposure during CT fluoroscopy-guided interventional procedures. Radiology. 2000;216:180–4.
Balter S, Hopewell JW, Miller DL, Wagner LK, Zelefsky MJ. Fluoroscopically guided interventional procedures: a review of radiation effects on patients’ skin and hair. Radiology. 2010;254:326–41.
Lucey BC, Varghese JC, Hochberg A, Blake MA, Soto JA. CT-guided intervention with low radiation dose: feasibility and experience. Am J Roentgenol. 2007;188:1187–94.
The Alliance for Radiation Safety in Pediatric Imaging. The image gently and step lightly campaigns. http://www.pedrad.org/associations/5364/ig/. Accessed Jan 2013.
Hohl C, Suess C, Wildberger JE, Honnef D, Das M, Muhlenbruch G, Scahller A, Gunther RW, Mahnken AH. Dose reduction during CT fluoroscopy: phantom study of angular beam modulation. Radiology. 2008;246:519–25.
National Electrical Manufacturers Association (NEMA). XR 25-2010, computed tomography dose check. http://www.nema.org/stds/xr25.cfm. Accessed Jan 2013.
Jones AK. Is it safe? A look at exposures in the shadow of MDCT scanner gantries. Med Phys. 2008;35:2656.
National Council on Radiation Protection and Measurements (NCRP). NCRP Report 168. Radiation dose management for fluoroscopically-guided interventional medical procedures. NCRP, Bethesda, MD, 2011.
Kato R, Katada K, Anno H, Suzuki S, Ida Y, Koga S. Radiation dosimetry at CT fluoroscopy: physician’s hand dose and development of needle holders. Radiology. 1996;201:576–8.
Schueler B, Sturchio G, Landsworth R, Magnuson D. Does new lightweight leaded eyewear provide adequate radiation protection for fluoroscopists? Med Phys. 2009;36:2747–8.
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Jones, A.K. (2014). Radiation Protection During CT-Guided Interventions. In: Ahrar, K., Gupta, S. (eds) Percutaneous Image-Guided Biopsy. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8217-8_3
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DOI: https://doi.org/10.1007/978-1-4614-8217-8_3
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