• Imaging Science in Dentistry
• /
• 제54권1호
• /
• pp.93-104
• /
• 2024

Chronic nonbacterial osteomyelitis(CNO) is histologically characterized by nonspecific osteitis. This inflammatory disorder, which lacks an infectious origin, typically presents with chronic pain and swelling at the affected site that can persist for months or even years. However, it is rare for CNO to affect the mandible. A 10-year-old girl presented with a primary complaint of pain in her left mandible. She had no significant medical or dental history. On examination, swelling was visible on the left buccal side, and imaging revealed radiolucent bone deterioration within the left mandible. This case report presents the radiological changes observed over a 12-year follow-up period. Variations in radiopacity, radiolucency, and periosteal reactions were noted periodically. This case highlights the radiological characteristics and findings that are crucial for the diagnosis of CNO, a condition for which no clear diagnostic criteria are currently available.

• 대한디지털의료영상학회논문지
• /
• 제11권1호
• /
• pp.35-41
• /
• 2009

This study was conducted to improve performance flow of PACS registration and output of external medical images by developing or adding File Transfer Protocol(FTP) Module on Order Communication System(OCS) and to upgrade efficiency of performance. The numbers of requests for examination of external medical images from January 2004 to December 2007 were investigated and the numbers of cases of examinations and losses were done respectively from January to June, 2007 as a period before the improvement and from July to December, 2007 as a period after it. Satisfaction of persons inputting external medical images of CD was asked directly before and after the improvement. When the numbers of requests for examination of external medical images from 2004 to 2007 2004 were investigated, they were 12,783, 16,774, 21,613 and 27,487 cases in 2004, 2005, 2005 and 2007 respectively. For the numbers of the requests from January to December, 2007 it was the lowest in February by recording 1846 and it was 2800 in October. While the number of loss of external medical images was averagely 3.6 before using FTP Module on OCS, it reduced to 0 and satisfaction increased to 98% after it. By utilizing FTP Module on OSC for PACS registration of external medical images, the images were delivered simultaneously with occurrence of order, PACS registration of many patients was conducted together and CDs were returned to patients immediately after sending images from outpatient clinics or wards to remove possibility of losing them. In addition, because the module was established on OCS and data were sent associated with order, problems related with order were decreased. By eliminating movement distance it was turned out to be very effective in terms of time and space.

• 대한디지털의료영상학회논문지
• /
• 제8권1호
• /
• pp.21-26
• /
• 2006

Hospitals these days are trying to introduce the a practice has recently been generalized in the test or diagnosis process, where test results and images from different test labs are interlinked together. This process is identical to that of physical aspect in EMR process, which computerizes the paper results within the hospital. One of the prerequisites for the process of computerizing test results is the interface between clinical test devices in the test labs. However, due to the variety of prescription inputs, disparity of test result papers, complexity of job in test labs and diversify of interfaces among the different devices, interconnection with the hospital information system is a complicated job. A universal control of clinical test devices which have independent communication protocols has become possible by connecting them with an interface workstation. As for the patients, waiting time for test has been reduced, and, thanks to the synchronized result retrieval system, it has become possible to check the test results on the very day of the test. As a result, the length of hospitalization has been reduced, too. In terms of workflow, as the transfer of charts and transfer of result papers are separated, the embarrassing job of collecting result papers has disappeared. As patients' test appointment and the results processing can be made on-line, extra work for doctors have disappeared. And, thanks to the computerization of test results information management, the job of statistical processing has become convenient.

• 대한디지털의료영상학회논문지
• /
• 제11권2호
• /
• pp.69-77
• /
• 2009

This study gives an account of the collateral standards in IEC 60601-1-3: 2008 specifying the general requirements for basic safety and essential performance of diagnostic X-ray equipment regarding radiation protection as it pertains to the production of X-rays. The collateral standards establish general requirements for safety regarding ionization radiation in diagnostic radiation systems and describe a verifiable evaluation method of suitable requirements regarding control over the lowest possible dose equivalent for patients, radiologic technologists, and others. The particular standards for each equipment can be determined by the general requirements in the collateral standard and the particular standard is followed in the risk management file. The guidelines for radiation safety of diagnostic radiation systems is written up in ISO 13485, ISO 14971, IEC 60601-1-3(2002)1st edition, medical electric equipment part 1-3, and the general requirements for safety-collateral standards: programmable electrical medical systems. Therefore the diagnostic radiation system protects citizens' health rights with the establishment and revisions of laws and standards for diagnostic radiation systems as a background for the general requirements of radiation safe guards applies, as an international trend, standards regarding the medical radiation safety management. The diagnostic radiation system will also assure competitive power through a conforming evaluation unifying the differing standards, technical specifications, and recognized processes.

• 대한영상의학회지
• /
• 제82권4호
• /
• pp.791-807
• /
• 2021

혈관염은 혈관벽의 염증을 특징으로 하는 드문 전신 질환으로 간혹 미만성 폐출혈이나 급성사구체신염으로 생명을 위협하기도 한다. 원인을 알 수 없는 일차성 혈관염도 있지만 자가면역 질환이나 약물, 감염, 종양 등 수많은 원인들에 의해 발생하는 이차성 혈관염도 있으며 분류가 복잡하고 명확한 진단검사가 없어 진단에 어려움이 있다. 또한 다양하고 비특이적인 증상과 징후 및 검사 소견을 보여 혈관염의 진단에는 임상양상, 영상 검사, 자가항체 검사, 병리소견 등 여러 가지 결과를 종합하는 것이 필수적이다. 이 종설에서는 혈관염의 분류와 진단에 중요한 증상 및 징후, 특징적으로 폐를 침범하는 대표적인 폐혈관염의 영상 소견과 감별진단, 그리고 새로운 혈관염 분류를 위한 국제적 연구인 Diagnostic and Classification Criteria in Vasculitis에 대해 소개하고자 한다.

• 대한영상의학회지
• /
• 제82권4호
• /
• pp.826-837
• /
• 2021

면역글로불린G4 연관 질환(immunoglobulin G4-related disease; 이하 IgG4-RD)는 IgG4를 생산하는 면역세포에 의한 만성 염증성질환으로, 주로 타액선, 누액선, 안와, 췌장, 담도, 간, 신장, 후복막, 대동맥, 폐, 림프절 등 다양한 장기를 침범하고, 조직학적으로 IgG4 양성 형질세포와 림프구의 침윤 및 나선형의 섬유화(storiform fibrosis), 폐색정맥염(obliterative phlebitis)을 특징으로 한다. IgG4-RD의 흉부 침범에서 가장 흔한 소견은 종격동 림프절 비대와 폐의 림프관주위 간질 비후이다. 폐의 기관지혈관주위 간질 비후와 우측 척추곁 밴드형 연부조직은 IgG4-RD의 특징적 소견이고, 그 외에도 폐결절 혹은 종괴, 간유리음영, 폐포 간질비후, 흉막삼출 및 비후, 흉벽이나 종격동 종괴, 대동맥과 관상동맥의 혈관염이 발생할 수 있다. 영상의학적으로는 악성 종양이나 감염 및 다양한 염증성질환과의 감별진단이 필요하다. 본 연구에서는 흉부에서 발생하는 IgG4-RD의 영상 소견과 감별진단에 대해 기술하였다.

• 대한영상의학회지
• /
• 제81권6호
• /
• pp.1504-1510
• /
• 2020

이 증례 보고는, 남성 유방에서의 비정형유관증식증 소견에 대한 영상의학적, 병리학적 소견을 담고 있다. 비정형유관증식증은 고위험 병변에 속하며 유방암의 전구 병변으로 잘 알려져 있다. 하지만, 이런 병변이 남성 유방에서 어떠한 임상적 의미를 갖는지는 잘 알려져 있지 않다. 남성 유방은 여성 유방과 달리 유관이 소엽을 구성하지 않기 때문이다. 지금까지 이러한 전구 병변의 영상 소견과 병리학적 소견을 다룬 문헌은 극소수이다. 이 증례 보고를 통해, 우리는 남성 유방에서 유방암 전구 병변의 가능한 영상 및 병리 소견을 제시하고, 문헌고찰을 하고자 한다.

• Journal of Korean Neurosurgical Society
• /
• 제50권4호
• /
• pp.304-310
• /
• 2011

Objective : Intrathecal methotrexate (MTX) therapy combined with whole brain radiotherapy (WBRT) is one of the major treatment modalities for leukemia and lymphoma involving the central nervous system (CNS). The purpose of this study was to retrospectively determine the incidences of leukoencephalopathy and disseminated necrotizing leukoencephalopathy (DNL) following intrathecal MTX therapy for CNS lymphoma or leukemia and to assess the potential risk factors. Methods : Between January 2000 and August 2009, 143 patients with CNS lymphoma or leukemia received intrathecal MTX therapy alone or in combination with WBRT at a single institution. Patients were followed up clinically and radiologically at regular two- or three-month intervals. Medical records were reviewed to obtain information regarding the patients' demographics, medical histories, radiologic characteristics, treatments, and clinical courses. Results : On follow-up MR images, leukoencephalopathy was found in 95 of 143 patients (66.4%). The median time to develop leukoencephalopathy was 6.6 months. Among those with leukoencephalopathy, four patients showed seven extensive white-matter changes with strongly enhancing lesions demonstrating DNL. Histological confirmation was done in six lesions of three patients and radiological diagnosis alone in one patient. Four lesions spontaneously disappeared on MR images without any treatment, with a mean duration of 14 months before disappearance of DNL. Conclusion : Leukoencephalopathy is a common phenomenon that occurs following intrathecal MTX therapy; however, DNL occurs at a very low incidence. For newly developed enhancing lesions, consideration for the occurrence of DNL should be taken to avoid unnecessary invasive procedures or therapies.

• 대한디지털의료영상학회논문지
• /
• 제9권2호
• /
• pp.23-30
• /
• 2007

This study attempts to propose an appropriate method of using digital medical imaging equipments, by studying the effects of automatic exposure control(AEC), grid ratio and the change of radiography distance on the patient dose and detertor acquisition dose during the procedure of acquiring image through a digital medical imaging detector. The change of dose following the change of grid ratio's exposure and radiography distance was measured, by using an abdominal phantom organized with tissue equivalent materials in an amorphous silicon thin film transistor detecter installed with AWC. The case to use grid ratio 12 : 1, focal distance 180cm to radiography distance 110cm in AEC, the patient dose increased rather when we used grid ration 10 : 1, focal distance 110cm. When AEC was not used,the dose necessary for image acquisition decreased as the grid ratio became higher and the distance became further. but detector acquisition dose was not reduced when in applied AEC. When purchasing digiral medical imaging equipments, optional items such as AEC and grid shall be accurately selected to satisfy the use of the equipments. Radiography error made by radiation technologist and unnenessary patient dose can be reduced by selecting equipments with a radiography distance marker equipment when it did not apply AEC. These equipments can also be helpful in maintaining high imaging quality, one of the merits of digital detectors.

• 한국방사선학회논문지
• /
• 제17권4호
• /
• pp.565-572
• /
• 2023

본 연구에서는 국내 공공 부문에서 실시하고 있는 의료기관 평가 중 영상검사와 관련된 현황을 살펴보고 개선 방향을 제시하고자 하였다. 의료기관 평가 중 영상검사와 관련된 주요 평가는 의료기관 인증평가와 영상검사 적정성 평가가 있으며, 의료기관 인증평가에서는 영상검사 운영과정, 정확한 결과 제공, 안전관리 절차 준수 등을 평가하고 있다. 영상검사 적정성 평가에서는 인력, 장비와 관련된 구조 지표, 환자평가 실시율, 피폭 저감 프로그램 등이 포함되어 있었다. 하지만 좀 더 안전하고 질 높은 영상검사를 위해서는 의료기관의 인증평가 참여율을 높이는 방안 마련이 필요하며, 영상검사 적정성 평가의 인력지표 개선과 인센티브 지급에 대한 고려도 필요하다. 마지막으로 국가 차원의 방사선 노출 통합관리도 함께 병행되어야 할 것이다.