Intracranial 2D and 3D DSA with flat panel detector of the direct conversion type: initial experience
Intracranial 2D and 3D DSA with flat panel detector of the direct conversion type: initial experience
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DOI：
10.1007/s00330-006-0233-2
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发表时间：
2006-05
影响因子：
5.9
通讯作者：
Yoshihisa Hatakeyama;S. Kakeda;Y. Korogi;N. Ohnari;J. Moriya;N. Oda;Kazuyoshi Nishino;W. Miyamoto
中科院分区：
文献类型：
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作者：
Yoshihisa Hatakeyama;S. Kakeda;Y. Korogi;N. Ohnari;J. Moriya;N. Oda;Kazuyoshi Nishino;W. Miyamoto
本研究旨在比较低辐射剂量直接转换型平板探测器（FPD）和传统图像增强器（I.I.）之间的二维（2D）数字减影血管造影（DSA）图像质量。应用FPD系统评价3DDSA对颅内血管的显示。本研究前瞻性纳入了15例连续患者（5例男性，10例女性;年龄范围：18-82岁;平均年龄：55.5岁）。所有患者均接受了FPD和I.I.-电视系统在一个投影。使用体模评价血管造影术期间的辐射剂量。用FPD系统从旋转DSA数据创建3D DSA图像。两名设盲的放射科医生独立评价FPD系统和I.I.- TV系统使用5分评估量表（极好至不可见）评估颅内血管的描绘。采用5分制（优至不可见）评价FPD系统3D DSA的MIP和容积再现（VR）图像。使用体模进行的DSA和荧光透视剂量测量显示，与I.I.-相比，FPD系统的剂量减少约85%和9%。电视系统，分别。对于2D DSA，FPD系统明显上级I.I.- TV系统对外周血管和穿支血管的显示率（p<0.05）。15例患者均能在3DDSA的MIP图像上充分显示周围血管和穿支血管。我们的FPD系统被发现上级I.I.-电视系统可使颅内小血管可视化，并显着降低辐射剂量，能够创建高质量的3D DSA图像，其高空间分辨率可以精确可视化小血管，例如穿通血管。
The purpose of this study was to compare the image quality of two-dimensional (2D) digital subtraction angiography (DSA) between a flat panel detector (FPD) of the direct conversion type with low radiation dose and a conventional image intensifier (I.I.)-TV system, and to assess 3D DSA with the FPD system in the depiction of intracranial vessels. Fifteen consecutive patients (five men, ten women; age range: 18–82 years; mean age: 55.5 years) were prospectively included in this study. All patients underwent 2D DSA with both the FPD and I.I.-TV system in one projection. The radiation doses during angiography were evaluated using a phantom. The 3D DSA images were created from the rotational DSA data with the FPD system. Two blinded radiologists independently evaluated 2D DSA with the FPD system and I.I.-TV system using a 5-point assessment scale (excellent to not visible) to assess the depiction of intracranial vessels. MIP and volume rendering (VR) images of 3D DSA with the FPD system were also evaluated using a 5-point scale (excellent to not visible). DSA and fluoroscopy dose measurements with the phantom showed a dose reduction of approximately 85% and 9% with the FPD system compared with the I.I.-TV system, respectively. For 2D DSA, the FPD system was significantly superior to the I.I.-TV system with respect to the visibility of the peripheral and perforating vessels (p<0.05). The peripheral and perforating vessels were also sufficiently visualized on MIP images of 3D DSA in all 15 cases. Our FPD system was found to be superior to the I.I.-TV system in visualizing small intracranial vessels combined with a significant reduction of radiation dose, and was able to create high-quality 3D DSA images on which high spatial resolution allowed precise visualization of small vessels such as perforating ones.