Computed tomographic pulmonary angiography using low tube voltage and slow contrast medium injection.

IF 1.7 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Emergency Radiology Pub Date : 2025-06-01 Epub Date: 2025-02-27 DOI:10.1007/s10140-025-02326-5

Keisuke Takiguchi, Atsushi Urikura, Tsukasa Yoshida, Kazuaki Nakashima, Koiku Asakura, Masahiro Endo

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引用次数: 0

Abstract

Purpose: The diagnosis of acute pulmonary thromboembolism (PTE) is often performed by computed tomographic pulmonary angiography (CTPA). This study investigated the effects of a CTPA protocol combining slow contrast medium injection and low tube voltage on radiation exposure and image quality.

Methods: We retrospectively analyzed 82 patients undergoing CT scans for cancer treatment efficacy or follow-up, and simultaneous PTE exclusion. Patients were divided into two groups. Those in Group A (n = 43) received slow contrast injection (0.7-1.5 mL/s), and those in Group B (n = 39) received rapid injection (2.6-4.2 mL/s). All CT scans were performed using a multi-detector row CT scanner with optimized tube voltage and current settings. Contrast medium doses were adjusted based on the patient's body weight.

Results: Group A had significantly lower radiation exposure compared with Group B. PTE was diagnosed in eight patients in Group A and seven in Group B, with no significant difference in prevalence rates. While Group B indicated higher mean CT values in the CTPA phase, the difference in the mean CT value of the pulmonary artery was only 29.6 Hounsfield units. Group A demonstrated superior contrast enhancement in parenchymal organs during the second phase.

Conclusion: The slow-injection CTPA method proved effective for simultaneous PTE exclusion and cancer treatment evaluation, maintaining diagnostic accuracy with reduced risks associated with rapid injection.

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使用低管电压和慢速注射造影剂的计算机断层肺血管造影术。

目的：急性肺血栓栓塞（PTE）的诊断通常采用计算机断层肺血管造影（CTPA）。本研究探讨了慢速注射造影剂和低管电压相结合的CTPA方案对辐射暴露和图像质量的影响。方法：回顾性分析82例接受CT扫描的癌症患者的治疗效果或随访情况，并同时排除PTE。患者分为两组。A组（n = 43）采用慢速注射（0.7 ~ 1.5 mL/s）， B组（n = 39）采用快速注射（2.6 ~ 4.2 mL/s）。所有CT扫描均使用优化管电压和电流设置的多检测器行CT扫描仪进行。造影剂剂量根据患者体重调整。结果：A组患者的辐射暴露明显低于B组，A组8例，B组7例，PTE患病率无显著差异。B组CTPA期CT均值较高，肺动脉CT均值差异仅为29.6 Hounsfield单位。A组在第二阶段表现为实质器官增强。结论：慢速注射CTPA方法可有效地同时进行PTE排除和肿瘤治疗评估，保持诊断准确性，并降低快速注射相关的风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Emergency Radiology RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-

CiteScore

4.60

自引率

4.50%

发文量

期刊介绍： To advance and improve the radiologic aspects of emergency careTo establish Emergency Radiology as an area of special interest in the field of diagnostic imagingTo improve methods of education in Emergency RadiologyTo provide, through formal meetings, a mechanism for presentation of scientific papers on various aspects of Emergency Radiology and continuing educationTo promote research in Emergency Radiology by clinical and basic science investigators, including residents and other traineesTo act as the resource body on Emergency Radiology for those interested in emergency patient care Members of the American Society of Emergency Radiology (ASER) receive the Emergency Radiology journal as a benefit of membership!