Reduction of the unnecessary dose from the over-range area with a spiral dynamic z-collimator: Comparison of beam pitch and detector coverage with 128-detector row CT

Radiological Physics and Technology

Volumn 5, Issue 1, 2012, Pages 53-58

  Shirasaka, Takashi ^a   Funama, Yoshinori ^b   Hayashi, Mutsukazu ^a   Awamoto, Shinichi ^a   Kondo, Masatoshi ^a   Nakamura, Yasuhiko ^a   Hatakenaka, Masamitsu ^c   Honda, Hiroshi ^c  

^a KYUSHU UNIVERSITY HOSPITAL   (Japan)

^b KUMAMOTO UNIVERSITY   (Japan)

^c KYUSHU UNIVERSITY   (Japan)

Author keywords

128 Detector row CT; Beam pitch; Detector coverage; Over range area; Spiral dynamic z collimator; Unnecessary dose

Indexed keywords

ARTICLE; COLLIMATOR; COMPUTER ASSISTED TOMOGRAPHY; CONTROLLED STUDY; DOSIMETER; INTERMETHOD COMPARISON; PRIORITY JOURNAL; RADIATION BEAM; RADIATION DETECTION; RADIATION DOSE; RADIATION EXPOSURE; RADIATION MEASUREMENT; RADIOSENSITIVITY;

ALGORITHMS; RADIATION DOSAGE; TOMOGRAPHY, X-RAY COMPUTED;

EID: 84858859655     PISSN: 18650333     EISSN: 18650341     Source Type: Journal    
DOI: 10.1007/s12194-011-0135-0     Document Type: Article

References (22)

1. Tzedakis A, Damilakis J, Perisinakis K, Stratakis J, Gourtsoyiannis N. The effect of z overscanning on patient effective dose from multidetector helical computed tomography examinations. Med Phys. 2005;32:1621-9. (Pubitemid 40880556)
2. Nicholson R, Fetherston S. Primary radiation outside the imaged volume of a multislice helical CT scan. Br J Radiol. 2002;75: 518-22. (Pubitemid 34863408)
3. Theocharopoulos N, Damilakis J, Perisinakis K, Gourtsoyiannis N. Energy imparted-based estimates of the effect of z overscanning on adult and pediatric patient effective doses from multislice computed tomography. Med Phys. 2007;34:1139-52. (Pubitemid 46555745)
4. Tzedakis A, Damilakis J, Perisinakis K, Karantanas A, Karabekios S, Gourtsoyiannis N. Influence of z overscanning on normalized effective doses calculated for pediatric patients undergoing multidetector CT examinations. Med Phys. 2007;34: 1163-75. (Pubitemid 46555747)
5. van der Molen AJ, Geleijns J. Overranging in multisection CT: quantification and relative contribution to dose - comparison of four 16-section CT scanners. Radiology. 2007;242:208-16. (Pubitemid 44956026)
6. Cohnen M, Poll LJ, Puettmann C, Ewen K, Saleh A, Modder U. Effective doses in standard protocols for multi-slice CT scanning. Eur Radiol. 2003;13:1148-53. (Pubitemid 36790610)
7. Flohr TG, Schaller S, Stierstorfer K, Bruder H, Ohnesorge BM, Schoepf UJ. Multi-detector row CT systems and image-reconstruction techniques. Radiology. 2005;235:756-73. (Pubitemid 40695869)
8. Taguchi K, Aradate H. Algorithm for image reconstruction in multi-slice helical CT. Med Phys. 1998;25:550-61. (Pubitemid 28178363)
9. Christner JA, Zavaletta VA, Eusemann CD, Walz-Flannigan AI, McCollough CH. Dose reduction in helical CT: dynamically adjustable z-axis X-ray beam collimation. AJR Am J Roentgenol. 2010;194:W49-55.
10. Walker MJ, Olszewski ME, Desai MY, Halliburton SS, Flamm SD. New radiation dose saving technologies for 256-slice cardiac computed tomography angiography. Int J Cardiovasc Imaging. 2009;25:189-99.
11. Mahesh M, Scatarige JC, Cooper J, Fishman EK. Dose and pitch relationship for a particular multislice CT scanner. AJR Am J Roentgenol. 2001;177:1273-5. (Pubitemid 33081462)
12. Rah J-E, Hong J-Y, Kim G-Y, Kim Y-L, Shin D-O, Suh T-S. A comparison of the dosimetric characteristics of a glass rod dosimeter and a thermoluminescent dosimeter for mailed dosimeter. Radiat Meas. 2009;44:18-22.
13. Baron RL. Understanding and optimizing use of contrast material for CT of the liver. AJR Am J Roentgenol. 1994;163:323-31. (Pubitemid 24242512)
14. Awai K, Takada K, Onishi H, Hori S. Aortic and hepatic enhancement and tumor-to-liver contrast: analysis of the effect of different concentrations of contrast material at multi-detector row helical CT. Radiology. 2002;224:757-63. (Pubitemid 34919809)
15. Hurwitz LM, Yoshizumi TT, Reiman RE, Paulson EK, Frush DP, Nguyen GT, Toncheva GI, Goodman PC. Radiation dose to the female breast from 16-MDCT body protocols. AJR Am J Roentgenol. 2006;186:1718-22. (Pubitemid 46115730)
16. Hohl C, Mahnken AH, Klotz E, Das M, Stargardt A, Muhlenbruch G, Schmidt T, Gunther RW, Wildberger JE. Radiation dose reduction to the male gonads during MDCT: the effectiveness of a lead shield. AJR Am J Roentgenol. 2005;184:128-30. (Pubitemid 40040916)
17. Lee SS, Kim TK, Byun JH, Ha HK, Kim PN, Kim AY, Lee SG, Lee MG. Hepatic arteries in potential donors for living related liver transplantation: evaluation with multi-detector row CT angiography. Radiology. 2003;227:391-9. (Pubitemid 36514752)
18. Schroeder T, Nadalin S, Stattaus J, Debatin JF, Malago M, Ruehm SG. Potential living liver donors: evaluation with an allin- one protocol with multi-detector row CT. Radiology. 2002;224:586-91. (Pubitemid 34809145)
19. Frederick MG, McElaney BL, Singer A, Park KS, Paulson EK, McGee SG, Nelson RC. Timing of parenchymal enhancement on dual-phase dynamic helical CT of the liver: how long does the hepatic arterial phase predominate? AJR Am J Roentgenol. 1996;166:1305-10. (Pubitemid 26160580)
20. Awai K, Hiraishi K, Hori S. Effect of contrast material injection duration and rate on aortic peak time and peak enhancement at dynamic CT involving injection protocol with dose tailored to patient weight. Radiology. 2004;230:142-50. (Pubitemid 37549795)
21. Goshima S, Kanematsu M, Kondo H, Yokoyama R, Miyoshi T, Nishibori H, Kato H, Hoshi H, Onozuka M, Moriyama N. MDCT of the liver and hypervascular hepatocellular carcinomas: optimizing scan delays for bolus-tracking techniques of hepatic arterial and portal venous phases. AJR Am J Roentgenol. 2006;187:W25-32.
22. Barrett JF, Keat N. Artifacts in CT: recognition and avoidance. Radiographics. 2004;24:1679-91.