Quantitative Analysis of the Image Layer in Rotational Panoramic Radiography

旋转全景摄影图像层的定量分析

• 批准号: 63570952
• 负责人: KIKUCHI Atsushi
• 金额: $ 1.09万
• 依托单位: Aichi-Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63570952/
• 关键词: Rotational Panoramic Radiography; Image Layer; Modulation transfer function; 回転パラノマX線撮影法

To analyze the three dimensional image layer, we measured the modulation transfer function (MTF) at the anterior to TMJ region in rotational panoramic radiography.These MTFs enabled us to determine the information transfer factor (ITF) introduced by McDavid et al, and defined the layer thickness.Veraview (J. Morita Corp. Japan) was used as a panoramic x-ray unit. Dupont HiPlus/ Kodak X-OMAT RP film was exposed with 1.1mm slit width to gives slit x-ray image at the fixed kV and mA. A lead slit, 0.1mm wide and 0.1mm thick was positioned at the center of the layer in each region.The slit was moved toward the film side and the tube side at given intervals. The NTF was obtained by the method of Doi et al.When we defined the limit of the layer by the ITF of 75, the measured layer thickness was 5.74mm in the anterior, 7.35mm in the canine, 15.1mm in the molar and 20.7mm in the TMJ region, respectively. The image layer obtained by our experiment was in fair agreement with the calculated one.

为了分析三维图像层，我们在旋转全景X线摄影中测量了TMJ区域前部的调制传递函数（MTF），这些MTF使我们能够确定McDavid等人提出的信息传递因子（ITF），并定义了层厚度。Dupont HiPlus/ Kodak X-OMAT RP胶片以1.1mm狭缝宽度曝光，以在固定kV和mA下给出狭缝X射线图像。在每个区域的膜层中心设置一个宽0.1mm、厚0.1mm的铅狭缝，狭缝以给定的间隔向膜侧和管侧移动。当以ITF为75为界时，测得前牙区、尖牙区、磨牙区和颞下颌关节区的层厚分别为5.74mm、7.35mm、15.1mm和20.7mm。通过我们的实验获得的图像层是在公平的协议与计算。

项目成果

内藤宗孝、他: "回転パノラマX線撮影法における断層域のMTF 第4報 全顎歯列弓域について" 歯科放射線. 29. 150 (1989)

Munetaka Naito 等人：“旋转全景放射线断层扫描区域的 MTF，第 4 次报告。关于整个牙弓区域”《牙科放射学》29. 150 (1989)。

Munetaka Naitoh et al: "Modulation transfer function of the image layer in rotational panoramic radiography (the 4th report)." Japanese Society of Dental Radiology 29: 150, 1989.

Munetaka Naitoh 等人：“旋转全景放射线成像中图像层的调制传递函数（第四次报告）”。

内藤宗孝,他: "回転パノラマX線撮影法における断層域のMTF第4報 全顎歯列弓域について" 歯科放射線. 29. 150 (1989)

Munetaka Naito 等人：“关于旋转全景放射线断层摄影区域 MTF 的第四次报告：关于整个牙弓区域”《牙科放射学》29. 150 (1989)。