Radiation dose reduction at low tube voltage with coronary artery bypass graft computed tomography angiography based on the contrast noise ratio index

被引：1

作者：

Masuda, Takanori ^{[1
]}

Nakaura, Takeshi ^{[2
]}

Funama, Yoshinori ^{[3
]}

Sato, Tomoyasu ^{[4
]}

Masuda, Shouko ^{[5
]}

Gotanda, Rumi ^{[1
]}

Arao, Keiko ^{[1
]}

Imaizumi, Hiromasa ^{[1
]}

Arao, Shinichi ^{[1
]}

Ono, Atsushi ^{[1
]}

Hiratsuka, Junichi ^{[1
]}

Awai, Kazuo ^{[6
]}

机构：

[1] Kawasaki Univ Med Welf, Dept Radiol Technol, 288 Matsushima, Kurashiki, Okayama 7010193, Japan

[2] Kumamoto Univ, Dept Diagnost Radiol, 1 1 1 Honjo, Kumamoto 8608556, Japan

[3] Kumamoto Univ, Dept Med Phys, Kumamoto, Japan

[4] Tsuchiya Gen Hosp, Dept Diagnost Radiol, Nakajima cho 3 30 Naka ku, Hiroshima 7308655, Japan

[5] Kawamura Clin Otemachi, Dept Radiol Technol, Naka-ku, Hiroshima 7300051, Japan

[6] Hiroshima Univ, Dept Diagnost Radiol, Hiroshima, Japan

来源：

RADIATION PROTECTION DOSIMETRY | 2023年 / 199卷 / 06期

关键词：

IMAGE QUALITY; CURRENT MODULATION; CT ANGIOGRAPHY; CHEST CT; SELECTION; SURGERY;

D O I：

10.1093/rpd/ncad049

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To compare the radiation dose and diagnostic ability of the 100-kVp protocol, based on the contrast noise ratio (CNR) index, during coronary artery bypass graft (CABG) vessels with those of the 120-kVp protocol. For the 120-kVp scans (150 patients), the targeted image level was set at 25 Hounsfield units (HU) (CNR120 = iodine contrast/25 HU). For the 100-kVp scans (150 patients), the targeted noise level was set at 30 HU to obtain the same CNR as in the 120-kVp scans (i.e. using 1.2-fold higher iodine contrast, CNR100 = 1.2 x iodine contrast/(1.2 x 25 HU) = CNR120). We compared the CNRs, radiation doses, detection of CABG vessels and visualisation scores of the scans acquired at 120 and 100 kVp, respectively. At the same CNR, the 100-kVp protocol may help reduce the radiation dose by similar to 30% compared with the 120-kVp protocol, without degradation of diagnostic ability during CABG.

引用

页码：527 / 532

页数：6

共 25 条

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