Temporal resolution measurement of 128-slice dual source and 320-row area detector computed tomography scanners in helical acquisition mode using the impulse method
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- 作者：Takanori Haraa ; hara_tnk2@ybb.ne.jp" class="auth_mail" title="E-mail the corresponding author ; Atsushi Urikurab ; at.urikura@scchr.jp" class="auth_mail" title="E-mail the corresponding author ; Katsuhiro Ichikawac ; ichikawa@mhs.mp.kanazawa-u.ac.jp" class="auth_mail" title="E-mail the corresponding author ; Takashi Hoshinod ; hoshi0311@hera.eonet.ne.jp" class="auth_mail" title="E-mail the corresponding author ; Eiji Nishimarue ; eiji2403@tk9.so-net.ne.jp" class="auth_mail" title="E-mail the corresponding author ; Shinji Niwaa ; shinji-niwa.gifu@aria.ocn.ne.jp" class="auth_mail" title="E-mail the corresponding author
- 关键词：Temporal resolution ; Helical acquisition mode ; Gantry rotation time ; Pitch factor
- 刊名：Physica Medica
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：32
- 期：4
- 页码：625-630
- 全文大小：792 K
文摘
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Temporal resolution (TR) of modern CT scanners was analysed using an impulse method.
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Scan combinations of pitch factor (P) and gantry rotation time (R) were assessed.
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For 320-row ADCT, TR ≈ R (with P < 1.0), whereas TR ≈ 0.5R (with P > 1.0).
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For 128-slice DSCT, TR improved with a shorter R and greater P.
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TR of helical acquisition modes were dependent on not only R but also P.