在临床光子计数探测器系统上的加多基冠状动脉CT血管学:动态循环幻影研究
Dmitrij Kravchenko1,2,3, Chiara Gnasso1,4,5, U Joseph Schoepf1
1Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA.
European radiology experimental
|October 18, 2024
概括
基于加多的对比剂 (GBCA) 尚未适用于冠状动脉CT血管造影 (CCTA) 在当前光子计数检测器CT (PCD-CT) 系统上在批准剂量下. 需要进一步优化PCD-CT协议和扫描仪设置,以便GBCA在冠状动脉成像中的实用性.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- CT CT 技术 技术 技术
背景情况:
- 冠状动脉计算机断层扫描血管学 (CCTA) 是冠状动脉的一个关键的非侵入性诊断工具.
- 静脉注射对比剂对于CCTA有效的血管评估至关重要.
- 类对比剂是标准的,但针对特定患者群体正在寻找替代品.
研究的目的:
- 评估使用基于加多的对比剂 (GBCA) 作为CCTA中化对比剂的替代品的可行性.
- 在一代临床双源光子计数探测器 (PCD) -CT系统上评估GBCA实用性.
主要方法:
- 使用了一个具有3D打印的胸部大动脉和冠状动脉模型的动态循环幻影.
- 加多酸丁胺被测试在最大临床剂量的50%,100%,150%和200%.
- 虚拟单能图像 (VMIs) 在PCD-CT上从40-100 keV重建,计算对比度与噪声比率 (CNR).
主要成果:
- 最高的冠状动脉衰减 (441 HU) 和CNR (29.5) 在40 keV时获得,最高的GBCA剂量为200%.
- 衰减和CNR在较高的keV重建和较低的GBCA剂量下降.
- 仅在150%或200%的GBCA剂量时,在40-45keV时才能达到足够的衰减 (>350HU) 进行诊断成像.
结论:
- 目前的PCD-CT协议和设置对于在临床上批准的剂量中用于CCTA的GBCA是不够的.
- 未来的PCD-CT进步,如4值模式和多材料分解,可能使GBCA k-边缘成像成为可能.
- 虽然GBCA增强的冠状动脉PCD-CT血管造影目前还不可行,但GBCA显示出在PCD-CT上可视化像大动脉这样的大血管的潜力.
相关概念视频
Imaging Studies for Cardiovascular System V: CT
3
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
3
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT
3
Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
3
Computed Tomography
4.3K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
4.3K
Radiological Investigation III: Pulmonary Angiogram and PET Scan
86
Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
86
Acute Coronary Syndrome III: Diagnostic studies
3
Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
3
Imaging Studies for Cardiovascular System III: X-Ray
149
The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
149


