• 한국방사선학회논문지
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• 제17권3호
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• pp.351-357
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• 2023

본 연구는 엑스선 등뼈 사위촬영에서 등뼈의 돌기사이관절 및 고리뿌리의 선예한 영상을 얻어 진단하고자 대학병원 영상의학과 방사선사 5명에게 주관적 평가 ROC 평가를 받아다. 주관적 평가에서 등뼈 엑스선 촬영에서 팬톰을 바로누운자세에서 LAO로 70° 기울게 하고 엑스선관을 머리 쪽 향하여 5°에서 20점을 받아 가장 높은 점수를 얻었다. 또한, 팬톰을 엎드려서 RAO로 60° 기울게 하고 엑스선관을 머리쪽을 향하여 8°에서 19점으로 가장 높은 점수를 받았다. 객관적 평가를 위하여 신호대 잡음비(SNR)를 산출했다. 영상신호 평균값(Mean값)과 표준편차(SD값)를 획득하기 위하여 1,564 mm²에서 ROI를 설정하였다. 객관적 평가는 등뼈 사위촬영, 바로누운자세는 팬톰을 LPO 70° 기울게 한 자세는 엑스선관을 머리쪽을 향하여 5°에서 신호대 잡음비가 6.154로 가장 높았으며, 또한 팬톰을 엎드려서 RAO 60° 와 엑스선관을 머리쪽을 향하여 8°에서 5,645으로 가장 높았다.

• 대한방사선기술학회지:방사선기술과학
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• 제1권1호
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• pp.25-29
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• 1978

This study was done for the purpose of graphing rather improved technique through reviewing conventional technigue of the thoracic vertebrae lateral projection. The roentgenographic images which were taken at Korea University Hospital from January, 1976 to December, 1977 were observed for this study. The results were as belows: 1. The quality of diagnostic radiograph turned out that good is 21.4%, intermediate is 40.7% and poor is 37.9%. 2. The poor quality of images the caused by overlapping shadows(59.6%), incorrect position of patients(15.0%), motion of patients(7.5%), over-exposure(8.3%), under-exposure(6.7%) and processing faults(2.9%). The images were taken by following four methods of experiments were campared and researched in order to improve the problems of conventional technigues which were came out on the poor radiographes. 1. (Method 1) Low mA-long time exposure during normal respiration 2. (Method 2) Short time exposure during normal respiration 3. (Method 3) After deep inspiration, short time exposure during expiration 4. (Method 4) After full expiration, short time exposure during inspiration. In a result of the above experiments, it was found that the improved image could be got from the method 3.

• Anatomy and Cell Biology
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• 제57권3호
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• pp.378-383
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• 2024

The 7th cervical vertebra (C7) is described as having the most prominent spinous process (SP) and is characterized as the "vertebra prominens" (VP) of the cervical spine in anatomy textbooks. The VP is an important anatomical landmark of the neck for clinical examination and therapeutic intervention. The present study identifies the level of the most prominent SP of the cervical and uppermost thoracic vertebrae in a cadaveric cohort. Thirty-nine (23 female and 16 male) cadavers of a mean age of 77.5 years were investigated in a prone position and a certain cervical kyphotic bending. The most prominent SP, at the base of the neck, was palpated and marked with a wedging nail into the SP of the vertebra. The cervical region was dissected, and a blind investigator examined whether the nail was placed into the SP of C7 or the SP of another upper or lower vertebra. In 19 out of 39 cadavers (48.7%), the C7 was identified as the VP (typical anatomy), followed by the C6 (in 14 cadavers, 35.9%), C5 (in 4 cadavers, 10.3%). In 2 cadavers (5.1%) the first thoracic vertebra was identified as having the most prominent SP. Although C7 is described as the VP, in the present study the SP of C7 was the most prominent in less than 50%. The high variable projection level of the most prominent SP of the cervical vertebra holds great clinical significance for spine examination, neck surgery, and spinal anesthesia.