合成千伏CT图像的剂量测量评价,这些图像是从巨电压CT生成的,用于使用条件GAN网络进行头部和部断层治疗
Yazdan Choghazardi1, Mohamad Bagher Tavakoli1, Iraj Abedi1
1Department of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Physical and engineering sciences in medicine
|July 28, 2025
概括
这项研究使用深度学习从巨电压CT (MVCT) 数据创建合成千伏CT (skVCT) 图像,改善辐射治疗计划的图像质量. 生成的skVCT图像可以进行准确的剂量测量评估,增强适应性辐射疗法 (ART).
科学领域:
- 医疗成像医学成像
- 人工智能在医学中的应用
- 辐射瘤学 辐射瘤学
背景情况:
- 大电压CT (MVCT) 与千伏CT (kVCT) 相比,图像对比度较低,这阻碍了放射治疗中精确的剂量测量评估.
- 准确的患者成像对于有效的辐射剂量输送和治疗计划至关重要.
研究的目的:
- 开发和评估一个深度学习模型 (pix2pix) 来从MVCT数据中生成高质量的合成kVCT (skVCT) 图像.
- 评估生成的skVCT图像的剂量测量准确性和图像质量,以便在适应性辐射疗法 (ART) 中潜在使用.
主要方法:
- 一个pix2pix深度学习网络被训练在25对的患者MVCT和kVCT图像上.
- 用视觉检查,峰值信号对噪声比率 (PSNR) 和结构相似度指数 (SSIM) 评估生成的skVCT图像.
- 通过比较来自skVCT和kVCT图像的治疗计划的马通过率,证实了剂量等效.
主要成果:
- skVCT图像显示出明显改善的图像质量,比MVCT更高的PSNR (31.9 ± 1.1 dB) 和SSIM (94.8 ± 1.3%) 值.
- 基于skVCT的治疗计划实现了优异的马传导率 (例如,2毫米/2%标准的99.78%),与基于kVCT的计划相美.
- pix2pix模型成功地从低对比度MVCT数据中生成了高保真度skVCT图像.
结论:
- 像素2像素深度学习方法有效地从MVCT数据中生成高质量的skVCT图像,克服了MVCT对比度的局限性.
- 基于skVCT的治疗计划的高剂量度准确性支持其在临床环境中的使用.
- 这种技术具有显著的潜力,可以通过实现更可靠的图像引导治疗来推进自适应性辐射疗法 (ART).
相关概念视频
Imaging Studies III: Computed Tomography
52
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
52
Computed Tomography
6.3K
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...
6.3K
Imaging Studies I: CT and MRI
449
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
449
Imaging Studies for Cardiovascular System V: CT
66
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...
66
Imaging Studies II: Positron Emission Tomography and Scintigraphy
235
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Fundamental Principles of PET
235
Positron Emission Tomography
5.7K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
5.7K


