CT扫描中的亨氏单位与锥形束CT中的灰度对比。
Comparison of the Hounsfield unit in CT scan with the gray level in cone-beam CT.
作者信息
Razi Tahmineh, Emamverdizadeh Parya, Nilavar Nadia, Razi Sedigheh
机构信息
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
出版信息
J Dent Res Dent Clin Dent Prospects. 2019 Summer;13(3):177-182. doi: 10.15171/joddd.2019.028. Epub 2019 Oct 7.
The present study was undertaken to compare the Hounsfield Unit (HU) in computed tomography (CT) with the gray level in CBCT in human tissues. In this study, 25 different soft and hard tissues were evaluated in 21 patients. CBCT images were taken with Newtom VGi machine (Verona, Italy) and CT images were prepared with Somatom Sensation unit (Siemens, Germany). The HU values of soft and hard tissues were compared with the gray level values of CBCT images. There was a strong correlation between the HU in CT and the gray level in CBCT in soft tissues (P<0.001, R = 0.85) and hard tissues (P<0.001, R = 0.74) and in general (P<0.001, R = 0.91). A high degree of agreement was seen between HU in CT and gray level in CBCT in both hard and soft tissues. Since the gray level in CBCT was similar to HU in CT and can be used as a parameter determine bone density in implant treatment and also to determine the bone type, the CBCT technique is recommended in such cases due to its low radiation dose, short time and low cost compared to CT.
本研究旨在比较人体组织中计算机断层扫描（CT）的亨氏单位（HU）与锥形束计算机断层扫描（CBCT）中的灰度。在本研究中，对21例患者的25种不同软硬组织进行了评估。CBCT图像由Newtom VGi机器（意大利维罗纳）采集，CT图像由Somatom Sensation设备（德国西门子）制备。将软硬组织的HU值与CBCT图像的灰度值进行比较。在软组织中（P<0.001，R = 0.85）、硬组织中（P<0.001，R = 0.74）以及总体上（P<0.001，R = 0.91），CT中的HU与CBCT中的灰度之间存在强相关性。在硬组织和软组织中，CT中的HU与CBCT中的灰度之间均表现出高度一致性。由于CBCT中的灰度与CT中的HU相似，并且可作为确定种植治疗中骨密度以及确定骨类型的参数，因此与CT相比，CBCT技术因其辐射剂量低、时间短和成本低，在这类情况下被推荐使用。
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