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By Vahid Yaghmai MD, Dushyant V Sahani MD
Regardless of technical advances utilizing MR and the emergence of puppy imaging, CT is still a regularly used imaging modality that has no longer stood nonetheless whereas others have thrived. Advances in CT have persisted apace with different modalities that have taken CT into new components of imaging that quite a few brief years in the past it could possibly no longer strategy. With the appearance of 64-slice CT, a better variety of photos might be taken in a far swifter time period. using CT perfusion within the mind and stomach are reviewed during this factor. innovative suggestions similar to 4D CT and twin power CT can be mentioned, in addition to CT functions for imaging of the coronary arteries and cardiac valves.
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Additional info for Advances in MDCT, An Issue of Radiologic Clinics
5. The Associated Press. Report links increased cancer risk to CT scans. The New York Times. November 29, 2007. 6. Khamsi R. CT scan radiation can equal nuclear bomb exposure. com. News Service. Accessed May 11, 2007. 7. Jessen KA, Shrimpton PC, Geleijns J, et al. Dosimetry for optimisation of patient protection in computed tomography. Appl Radiat Isot 1999;50:165–72. 8. Nagel HD. Radiation exposure in computed tomography. 2nd edition. Frankfurt: COCIR; 2000. 9. Shope TB, Gagne RM, Johnson GC. A method for describing the doses delivered by transmission x-ray computed tomography.
70 For abdominal-pelvic CT, which directly irradiates the fetus, scan parameters (such as wider beam collimation, higher pitch, and lower mAs, kV, and scan range) can be selected to reduce the fetal dose to approximately 23 mGy per scan phase. 91 Data from Wagner LK, Lester RG, Saldana LR. Exposure of the pregnant patient to diagnostic radiations: a guide to medical management. Madison (WI): Medical Physics Publishing; 1997; with permission; and Wagner LK, Hayman LA. Pregnancy and women radiologists.
Dose reduction in CT by anatomically adapted tube current modulation: simulation studies. Med Phys 1999;26(11):2235–47. 50. Schmidt B. Dose calculations for computed tomography [dissertation]. Reports from the Insitute of Medical Physiks 2001;7 [in German]. 51. Schmidt B, Kalender WA. A fast voxel-based Monte Carlo method for scanner- and patient-specific dose calculations in computed tomography. In: Guerra AD, editor, Physica Medica, vol 18. Erlangen, Germany: European Journal of Medical Physics; 2002.
Advances in MDCT, An Issue of Radiologic Clinics by Vahid Yaghmai MD, Dushyant V Sahani MD