• 대한치과의사협회지
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• 제54권9호
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• pp.704-711
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• 2016

Radiologic images in dentistry are essential to perform the diagnosis, treatment, and tracking process of prognosis, thus the ability of accurate evaluation in the diagnostic images is requested for dental clinician. Radiologic interpretation means recognition of a normality and an abnormality and to report the possible diagnosis and differential diagnosis list. Therefore, dental clinicians should be familiar with the basic principle of interpretation of intraoral and extraoral radiographic images primarily used in dental clinics. Recently, dental cone beam CT is widely used for diagnositc process, thus understanding the three dimensional images is requested. The objective of this manuscript is to help the dental clinicians to interpret accurately the diagnostic images by introducing the basic principles of the step by step analytic process in the appearance of a lesion.

• Korean Journal of Radiology
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• 제23권7호
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• pp.732-741
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• 2022

Objective: To determine the impact of dedicated subspecialized radiologists in multidisciplinary team (MDT) discussions on the management of lower gastrointestinal (GI) tract malignancies. Materials and Methods: We retrospectively analyzed the data of 244 patients (mean age ± standard deviation, 61.7 ± 11.9 years) referred to MDT discussions 249 times (i.e., 249 cases, as five patients were discussed twice for different issues) for lower GI tract malignancy including colorectal cancer, small bowel cancer, GI stromal tumor, and GI neuroendocrine tumor between April 2018 and June 2021 in a prospective database. Before the MDT discussions, dedicated GI radiologists reviewed all imaging studies again besides routine clinical reading. The referring clinician's initial diagnosis, initial treatment plan, change in radiologic interpretation compared with the initial radiology report, and the MDT's consensus recommendations for treatment were collected and compared. Factors associated with changes in treatment plans and the implementation of MDT decisions were analyzed. Results: Of the 249 cases, radiologic interpretation was changed in 73 cases (29.3%) after a review by dedicated GI radiologists, with 78.1% (57/73) resulting in changes in the treatment plan. The treatment plan was changed in 92 cases (36.9%), and the rate of change in the treatment plan was significantly higher in cases with changes in radiologic interpretation than in those without (78.1% [57/73] vs. 19.9% [35/176], p < 0.001). Follow-up records of patients showed that 91.2% (227/249) of MDT recommendations for treatment were implemented. Multiple logistic regression analysis revealed that the nonsurgical approach (vs. surgical approach) decided through MDT discussion was a significant factor for patients being managed differently than the MDT recommendations (odds ratio, 4.48; p = 0.017). Conclusion: MDT discussion involving additional review of radiology examinations by dedicated GI radiologists resulted in a change in the treatment plan in 36.9% of cases. Changes in treatment plans were significantly associated with changes in radiologic interpretation.

• 치과방사선
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• 제26권2호
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• pp.147-152
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• 1996

Six observers with different amount of experience in the field of Oral and Maxillofacial Radiology interpreted the radiographs of 13 cases of ameloblastoma and 8 cases of odontogenic keratocyct which were confirmed histopathologically and showed pseudo-multilocular appearance and scalloped border radiographically. The authors examined the accuracy of radiologic diagnoses, interobserver agrement and intraobserver agreement. The obtained results were as follows; 1. The accuracy of radiologic diagnosis ranged from 0.48 to 0.81. The average value was 0.61. 2. The accuracy of radiologic diagnosis for ameloblastoma(0.55) was lower than that for odontogenic keratocyst(0.70) (P<0.05). 3. The overall agreement among the 6 observers was 14.3％ at the first interpretation and 19.0％ at the second interpretation. 4. The intraobserver agreement of each observer expressed in kappa index ranged from -0.14 to 0.64. The overall intraobserver agreement was 0.29. 5. The intraobserver agreement of each observer for ameloblastoma and odontogenic keratocyst ranged from -0.07 to 0.65 and from -0.25 to 1.00, respectively. The overall intraobserver agreement for ameloblatoma and odontogenic keratocyst were 0.27 and 0.26, respectively. 6. The diagnostic accuracy highly correlated to the intraobserver agreement(r=0.6370).

• Clinics in Shoulder and Elbow
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• 제7권1호
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• pp.14-22
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• 2004

Purpose: To evaluate a usefulness of the simple radiograph in the patients with chronic shoulder pain 50 years and older. Material and method: 1152 patients with chronic shoulder pain and 100 asymptomatic individuals were involved in this study. All patients were 50 years and older. We excluded patients who had a history of fracture or dislocation. Radiographic interpretation was performed on a shoulder AP view, an axillary view and a supraspinatus outlet view. For statistical analysis, a chi-square test was performed. A p value of <0.05 was considered statistically significant. Results: Abnormal radiologic findings were identified in 369(32%) out of 1152 patients with a shoulder pain: greater tuberosity sclerosis, acromial sclerosis, subacromial osteophytes are common abnormal radiologic findings. A rotator cuff tear or impingement syndrome was identified on a final diagnosis in 61(85.2%) out of the 76 patients with radiologic abnormalities in both greater tuberosity and acromion (p<0.05). Abnormal radiologic findings were identified in 18% of the asymptomatic individuals. Conclusion: Simple radiographic analysis is an important primary diagnostic tool in patients (50 years and old) with chronic shoulder pain.

• 대한치과의사협회지
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• 제54권9호
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• pp.729-733
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• 2016

Teleradiology is the electronic transmission of radiologic images from one location to another for the purpose of interpretation and/or consultation. Today, images can be easily transmitted to another location using the high-speed internet. In medical area, teleradiology has developed rapidly in recent 10 years due to the imbalance between the demand and availability of diagnostic services. However, teleradiology in dentistry is still inactive. I would like to overview the current teleradiology system, and discuss the necessity and the potentiality.

• 대한방사선기술학회지:방사선기술과학
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• 제30권4호
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• pp.313-320
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• 2007

[ $\ulcorner$ ]의료기사 등에 관한 법률$\lrcorner$에는 다수 직종을 총괄하여 규정하고 있어 방사선사 업무의 전문성 향상과 방사선의료기술에 대한 국민의 건강권을 보장하기 어렵다. 따라서 방사선사에 관련된 법령을 개별적으로 제정하는것이 요청된다. 개별법으로서 방사선사법은 궁극적으로 국민의 건강증진을 목적으로 하는 방사선사의 책임규제에 관한 법으로 제정되어야 한다. 이를 위해 전문방사선사에 대한 규정을 신설하고 보수교육과 면허관리제도의 강화를 통하여 국민들이 보다 수준 높은 양질의 방사선의료기술을 제공받을 수 있도록 하여야 한다. 또한 방사선사의 역할과 업무를 명확히 규정하여 국민에게 제공되는 의료방사선서비스의 질적 수준을 확보하여야 한다. 정부기관에는 의료방사선정책심의위원회를 두어 의료방사선의 안전관리와 방사선사 인력의 수급, 기타 의료방사선정책에 관한 중요한 사항이 검토되고, 심의되어야 한다. 그밖에 방사선조사선량의 기록, 관리를 통하여 방사선피폭으로부터 국민의 건강보호를 위한 규정도 필요하며, 팀의료의 일원으로서 방사선사의 지위가 보장되어야 한다.

• 대한방사선기술학회지:방사선기술과학
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• 제32권2호
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• pp.147-151
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• 2009

ROC에 의한 의료영상을 평가하는 방법으로 지금까지는 5단계로 평가하는 평정확신도법이 일반적으로 사용되었다. 이 평정확신도법에서는 TPF나 FPF의 산출을 쉽게 구하는 것이 가능하나, 실험에 있어서 부드럽게 ROC곡선의 추정을 하기 위해서 관찰자에 대해 적당한 카테고리 배분이 요구되거나 또 짜여진 카테고리 배분을 위해 그 데이터가 무효해지는 경우가 많다. 이러한 문제를 해결하기 위해 또는 관찰실험 이외의 데이터에도 ROC해석의 응용이 가능해지도록 카테고리 분류가 되어 있지 않은 연속적으로 분포된 실험결과를 이용 ROC 해석을 행하는 방법인 연속확신도법이 보고 되었다. 하지만 국내에서는 의료영상의 평가에 연속확신도법을 적용한 예가 거의 없어서 흉부 디지털영상의 평가에 적용해 보았다. 그 결과 상용화된 프로그램에 의하여 부드러운 ROC곡선을 그릴 수 있었으며, 특성값을 쉽게 측정할 수 있어 디지털 의료영상의 평가에 적절히 사용될 수 있으리라 사료된다.

• 핵의학기술
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• 제28권1호
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• pp.13-17
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• 2024

Bone Mineral Densitometry (BMD) values is determined numerically with T or Z-score while the image is not considered in the interpretation. Abnormal finding was observed in the left femoral bone density image of a 64-year-old female patient who underwent a left kidney transplantation. This was due to the ethiodized oil used for embolization in the treatment of lymphatic leakage. Radiologic technologists should not only monitor changes of BMD values, but keep in mind to assess the changes in the image to provide accurate information to the patient.

• Korean Journal of Radiology
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• 제24권3호
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• pp.224-234
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• 2023

Magnetic resonance imaging (MRI) is a standard imaging modality for diagnosing spinal stenosis, which is a common degenerative disorder in the elderly population. Standardized interpretation of spinal MRI for diagnosing and grading the severity of spinal stenosis is necessary to ensure correct communication with clinicians and to conduct clinical research. In this review, we revisit the Lee grading system for central canal and neural foraminal stenosis of the cervical and lumbar spine, which are based on the pathophysiology and radiologic findings of spinal stenosis.

• 치과방사선
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• 제17권1호
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• pp.107-120
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• 1987

The purpose of this study was three-fold: to reexamine whether periapical and central lesions can be detected on the radiograph when they are in the cancellous bone, to investigate regianal differences in radiograph visualization of the lesion, and to. compare the interpretation of radiagraphs by densitometric analysis with the visual interpretation af the same radiographs. Forty-nine apical lesions and eighty-two central lesions were made in 8 mandibles and radiographed serially while being enlarged and deepened. All radiagraphs were evaluated by three dental radiologists. Each lesion was scored of 3 to 0, based on the radiographic appearances. Special radiographs of 15 apical and central lesions were analysed by densitometer and the results were compared with the scores which were previously assigned by three examiners. From this study the following conclusians could be drawn; 1. Experimental lesions confined to cancellous bone were detected an the radiagraphs in 41.3% of the cases. 2. Visualization of periapical lesions in cancellous bone was more apparent than that of central lesions in cancellous bone. 3. Visualization of the periapical lesions confined to. cancellous bane was highest in molar teeth, and detection of the central lesions in alveolar portion was easier than those in lower portion of mandibular body area. 4. It was possible to detect the experimental lesions without cortical plate involvement in 78.6% of the all lesions. 5. Densitometric analysis of radiographs could reproducibly distinguish bone changes, especially of central lesions in cancellous bone.