Optimisation of swallowing ct examination: Dose reduction and image quality

Masanao Kobayashi; Yasuki Asada; Tomonobu Haba; Yuta Matsunaga; Kosuke Matsubara; Kazuyuki Minami

doi:10.1093/rpd/ncz029

Optimisation of swallowing ct examination: Dose reduction and image quality

Masanao Kobayashi, Yasuki Asada, Tomonobu Haba, Yuta Matsunaga, Kosuke Matsubara, Kazuyuki Minami

Faculty of Radiological Technology

Research output: Contribution to journal › Article

Abstract

This study sought to optimise the swallowing computed tomography (SCT) scan protocol for use with the new wide-area detector-row CT (ADCT) scanner and to estimate patient dose in terms of the organ-absorbed dose and the effective dose. The conventional ADCT (ADCT_ViSION) and the new ADCT (ADCT_GENESIS) scanner were compared using: (1) the organ-absorbed dose and the effective dose, with a phantom study, (2) the detailed organ-absorbed doses of the neck region, using a Monte Carlo simulation and (3) a relative visual quality analysis. The effective energy differed significantly between the ADCT_ViSION (50 keV) and the ADCT_GENESIS (57 keV). The effective doses were 2.9 and 1.9 mSv, respectively. Compared with the ADCT_ViSION, the absorbed dose was reduced by 34% with the ADCT_GENESIS. With the ADCT_GENESIS, the tube current could be reduced from 40 to 30 mA. With the optimised scan protocol, a further 25% dose reduction can be achieved.

Original language	English
Pages (from-to)	421-431
Number of pages	11
Journal	Radiation protection dosimetry
Volume	185
Issue number	4
DOIs	https://doi.org/10.1093/rpd/ncz029
Publication status	Published - 31-12-2019

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All Science Journal Classification (ASJC) codes

Radiation
Radiological and Ultrasound Technology
Radiology Nuclear Medicine and imaging
Public Health, Environmental and Occupational Health

Cite this

Kobayashi, M., Asada, Y., Haba, T., Matsunaga, Y., Matsubara, K., & Minami, K. (2019). Optimisation of swallowing ct examination: Dose reduction and image quality. Radiation protection dosimetry, 185(4), 421-431. https://doi.org/10.1093/rpd/ncz029

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abstract = "This study sought to optimise the swallowing computed tomography (SCT) scan protocol for use with the new wide-area detector-row CT (ADCT) scanner and to estimate patient dose in terms of the organ-absorbed dose and the effective dose. The conventional ADCT (ADCTViSION) and the new ADCT (ADCTGENESIS) scanner were compared using: (1) the organ-absorbed dose and the effective dose, with a phantom study, (2) the detailed organ-absorbed doses of the neck region, using a Monte Carlo simulation and (3) a relative visual quality analysis. The effective energy differed significantly between the ADCTViSION (50 keV) and the ADCTGENESIS (57 keV). The effective doses were 2.9 and 1.9 mSv, respectively. Compared with the ADCTViSION, the absorbed dose was reduced by 34% with the ADCTGENESIS. With the ADCTGENESIS, the tube current could be reduced from 40 to 30 mA. With the optimised scan protocol, a further 25% dose reduction can be achieved.",

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AU - Minami, Kazuyuki

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10.1093/rpd/ncz029