Klempka Anna, Neumayer Philipp, Schröder Alexander, Ackermann Eduardo, Hetjens Svetlana, Clausen Sven, Groden Christoph
Department of Neuroradiology, University Medical Centre Mannheim, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany.
Department of Medical Statistics and Biomathematics, Medical Faculty Mannheim, University of Heidelberg, 68167 Mannheim, Germany.
Diagnostics (Basel). 2024 Jul 19;14(14):1561. doi: 10.3390/diagnostics14141561.
Advances in computed tomography (CT) technology, particularly photon-counting CT (PCCT), are reshaping the possibilities for medical imaging. PCCT in spectral imaging enables the high-resolution visualization of tissues with material-specific accuracy. This study aims to establish a foundational approach for the in vivo visualization of intracranial blood using PCCT, focusing on non-enhanced imaging techniques and spectral imaging capabilities.
We employed photon-counting detector within a spectral CT framework to differentiate between venous and arterial intracranial blood. Our analysis included not only monoenergetic +67 keV reconstructions, but also images from virtual non-contrast and iodine phases, enabling detailed assessments of blood's characteristics without the use of contrast agents.
Our findings demonstrate the ability of PCCT to provide clear and distinct visualizations of intracranial vascular structures. We quantified the signal-to-noise ratio across different imaging phases and found consistent enhancements in image clarity, particularly in the detection and differentiation of arterial and venous blood.
PCCT offers a robust platform for the non-invasive and detailed visualization of intravascular intracranial blood. With its superior resolution and specific imaging capabilities, PCCT lays the groundwork for advancing clinical applications and research, notably in the diagnosis and management of intracranial disorders. This technology promises to improve diagnostic accuracy by enabling more precise imaging assessments.
计算机断层扫描（CT）技术的进步，尤其是光子计数CT（PCCT），正在重塑医学成像的可能性。光谱成像中的PCCT能够以物质特异性精度对组织进行高分辨率可视化。本研究旨在建立一种使用PCCT对颅内血液进行体内可视化的基础方法，重点关注非增强成像技术和光谱成像能力。
我们在光谱CT框架内采用光子计数探测器来区分颅内静脉血和动脉血。我们的分析不仅包括单能+67 keV重建，还包括虚拟非增强和碘期图像，从而能够在不使用造影剂的情况下详细评估血液特征。
我们的研究结果表明，PCCT能够清晰、明显地显示颅内血管结构。我们量化了不同成像阶段的信噪比，发现图像清晰度持续提高，尤其是在动脉血和静脉血的检测与区分方面。
PCCT为颅内血管内血液的无创、详细可视化提供了一个强大的平台。凭借其卓越的分辨率和特定的成像能力，PCCT为推进临床应用和研究奠定了基础，尤其是在颅内疾病的诊断和管理方面。这项技术有望通过实现更精确的成像评估来提高诊断准确性。
