Reduction of X-ray exposure and contrast material dose at abdominal CT using low kV or plural kV setting

使用低 kV 或多 kV 设置减少腹部 CT 中的 X 射线暴露和造影剂剂量

• 批准号: 21591565
• 负责人: AWAI Kazuo
• 金额: $ 2.91万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21591565/
• 关键词: CT; 管電圧; コントラスト; X線被曝; 低電圧CT; Dual energy CT; CNR; CT仮想内視鏡

We performed phantom experiment with CT. The phantom simulated adult abdomen and included water and iodine solution with 0-12 mg/ dl. The phantom was scanned with various tube voltage(80, 100, 120, 140 kVp) and tube current setting(30-200mA). We investigated noise value, contrast-noise-ration, figure of merit, noise power spectrum, visual contrast resolution. We also investigated the effect of image filters and reconstruction algorithm. The CNR and visual contrast resolution was the most acceptable at 80 kVp scanning, however, noise was mostly increased at 80 kVp scan and noise reduction by image filters or dedicated reconstruction algorithm was necessary. We also performed clinical studies as to low kV CT scanning.

我们用CT进行了模型实验。该体模模拟成人腹部并包含水和0-12mg/dl的碘溶液。使用各种管电压（80、100、120、140 kVp）和管电流设置（30-200mA）扫描体模。我们研究了噪声值、对比度噪声比、品质因数、噪声功率谱、视觉对比度分辨率。我们还研究了图像滤波器和重建算法的效果。 CNR 和视觉对比度分辨率在 80 kVp 扫描时是最可接受的，然而，噪声在 80 kVp 扫描时大部分增加，并且需要通过图像滤波器或专用重建算法来降低噪声。我们还进行了低电压 CT 扫描的临床研究。

项目成果

A New Method forModulation Transfer Function Measurements forImage Noise Reduction Algorithms of CT ImagesUtilizing a Noise Power Spectrum

利用噪声功率谱测量CT图像图像降噪算法调制传递函数的新方法

• 发表时间: 2010
• 作者: Nishimaru E;Ichikawa K;Kiguchi M;IshifuroM;Nagata Y;Awai K
• 通讯作者: Awai K

Optimal setting of automatic exposure control based on image noiseand contrast on iodine-enhanced CT

基于图像噪声和对比度的碘增强CT自动曝光控制优化设置

• DOI: 10.1016/j.acra.2011.11.011
• 发表时间: 2012
• 期刊: Acadmic Radiology 19
• 作者: Murazaki H;Funama Y;Sugaya Y;Miyazaki O;Tomiguchi S;Awai K.
• 通讯作者: Awai K.

MDCTにおけるX線被ばく線量低減

减少 MDCT 中的 X 射线照射剂量

• 发表时间: 2010
• 作者: Yoshikawa T;Kanda T;Ohno Y;Negi N;Kanata N;Takenaka D;Koyama H;Kitajima K;Sugimura K;冨口静二;粟井和夫
• 通讯作者: 粟井和夫

Combination of a low-tube-voltage technique with hybrid iterative reconstruction (iDose) algorithm at coronary computed tomographic angiography.

• DOI: 10.1097/rct.0b013e31821fee94
• 发表时间: 2011-07
• 期刊: Journal of computer assisted tomography
• 影响因子: 1.3
• 作者: Funama Y;Taguchi K;Utsunomiya D;Oda S;Yanaga Y;Yamashita Y;Awai K
• 通讯作者: Awai K

Feasibility of extended-coverage perfusion anddynamic computer tomography(CT) angiography using toggling-table technique on 64-slice CT

64层CT上使用切换台技术进行大范围灌注和动态计算机断层扫描（CT）血管造影的可行性

• 发表时间: 2011
• 期刊: J Neuroradiol
• 作者: Horiguchi J;Kiura Y;Tanaka J;Fukuda H;Kiguchi M;Fujioka C;Kurisu K;Awai K.
• 通讯作者: Awai K.