Comparison of free breathing versus breath-hold in perfusion imaging using dynamic volume CT
Comparison of free breathing versus breath-hold in perfusion imaging using dynamic volume CT
复制标题
使用动态容积 CT 灌注成像中自由呼吸与屏气的比较
DOI：
10.1007/s13244-012-0169-9
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发表时间：
2012
影响因子：
4.7
通讯作者：
Rogalla P
中科院分区：
文献类型：
--
作者：
Kandel S;Meyer H;Hein P;Lembcke A;Rueckert JC;Rogalla P
目的比较两种不同扫描方案(自由呼吸和屏气)的胰腺灌注成像，并评价其对图像配准的影响。材料和方法40例患者接受动态容积CT胰腺灌注分析，随机分为浅呼吸组(I组)和屏气组(II组)。两种动态CT扫描方案均包括17次低剂量容积扫描。以主动脉衰减最大的体积为参照进行刚性图像配准。所有其他体积在视觉上与作为感兴趣体积区域的胰腺病变相匹配。每个患者对后处理的总体需求被计算为所有体积的三维向量长度相对于相对患者来源的中位数。每组记录不需要登记的卷数。结果I组和II组的登记不匹配分别为2.61百万mm(SD，1.57)和4.95百万mm(SD，2.71)(P<； 0.005)。I组28个体积(8.2%)和II组47个体积(14.1%)不需要手动配准(P= 0.014)。结论动态容量CT扫描时浅呼吸减少了对运动校正的总体需求，因此可能有利于胰腺的灌注成像。主要信息·灌注CT扫描时的浅呼吸降低了对运动校正的总体需求。·浅呼吸可能有利于胰腺的灌注成像。
ObjectivesTo compare two scanning protocols (free breathing versus breath-hold) for perfusion imaging using dynamic volume computed tomography (CT) and to evaluate their effects on image registration.Material and methodsForty patients underwent dynamic volume CT for pancreatic perfusion analysis and were randomly assigned to either a shallow-breathing (I) or breath-hold (II) group. Both dynamic CT protocols consisted of 17 low-dose volumetric scans. Rigid image registration was performed by using the volume with highest aortic attenuation as reference. All other volumes were visually matched with the pancreatic lesion serving as the volumetric region of interest. The overall demand for post-processing per patient was calculated as the median of three-dimensional vector lengths of all volumes in relation to the relative patient origin. The number of volumes not requiring registration was recorded per group.ResultsRegistration mismatch for groups I and II was 2.61 mm (SD, 1.57) and 4.95 mm (SD, 2.71), respectively (P< 0.005). Twenty-eight volumes in group I (8.2%) and 47 volumes in group II (14.1%) did not require manual registration (P= 0.014).ConclusionShallow breathing during dynamic volume CT scanning reduces the overall demand for motion correction and thus may be beneficial in perfusion imaging of the pancreasMain Messages•Shallow breathing during perfusion CT scanning reduces the overall demand for motion correction.•Shallow breathing may be beneficial in perfusion imaging of the pancreas.•Image registration is crucial for CT perfusion imaging.
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影响因子：
5
作者：
Ng, Chaan S.;Wang, Xiaohong;Tannir, Nizar M.
通讯作者：
Tannir, Nizar M.
影响因子：
3.3
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
4.8
作者：
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通讯作者：
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