• Title/Summary/Keyword: MRI

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The Accuracy of ICD codes for Cerebrovascular Diseases in Medical Insurance Claims (의료보험청구자료중 뇌혈관질환 상병기호의 정확도에 관한 연구)

  • Park, Jong-Ku;Kim, Ki-Soon;Lee, Tae-Yong;Lee, Kang-Sook;Lee, Duk-Hee;Lee, Sun-Hee;Jee, Sun-Ha;Suh, Il;Koh, Kwang-Wook;Ryu, So-Yeon;Park, Kee-Ho;Park, Woon-Je;Kim, Chun-Bae
    • Journal of Preventive Medicine and Public Health
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    • v.33 no.1
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    • pp.76-82
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    • 2000
  • Objectives : We attempted to assess He accuracy of ICD codes for cerebrovascular diseases in medical insurance claims (ICMIC) and to investigate the reasons for error. This study was designed as a preliminary study to establish a nationwide surveillance system. Methods : A total of 626 patients with medical insurance claims who indicated a diagnosis of cerebrovascular diseases during the period from 1993 to 1997 was selected from the Korea Medical Insurance Corporation cohort (KMIC cohort: 115,600 persons). The KMIC cohort was 10% of those insured who had taken health examinations in 1990 and 1992 consecutively. The registered medical record administrators were trained in the survey technique and gathered data from March to May 1999. The definition of cerebrovascular diseases in this study included cases which met ore of two criteria (Minnesota, WHO) or 'definite stroke' in CT/MRI finding. We questioned the medical record administrators to explain the error if the final diagnoses were not coded as stroke. Results : The accuracy rate of the ICMIC was 83.0% (425 cases) Medical records were not available for 8.2% (51 cases) due to the closing of hospitals, the absence of a computer system or omission of medical record, etc. Sixty-three cases (10.0%) were classified as impossible to interpret due to insufficient records in 'major clinical symptoms' or 'neurological deficits'. The most common reason was 'to meet review criteria of medical insurance benefits (52.9%)'. The department where errors in the ICMIC occurred most frequently was the department for medical insurance claims in the hospital. Conclusion : The accuracy rate of the ICMIC was 83.0%.

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Dynamic Computed Tomography based on Spatio-temporal Analysis in Acute Stroke: Preliminary Study (급성 뇌졸중 환자의 시공간 분석 기법을 이용한 동적 전산화 단층 검사: 예비 연구)

  • Park, Ha-Young;Pyeon, Do-Yeong;Kim, Da-Hye;Jung, Young-jin
    • Journal of radiological science and technology
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    • v.39 no.4
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    • pp.543-547
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    • 2016
  • Acute stroke is a one of common disease that require fast diagnosis and treatment to save patients life. however, the acute stroke may cause lifelong disability due to brain damage with no prompt surgical procedure. In order to diagnose the Stroke, brain perfusion CT examination and possible rapid implementation of 3D angiography has been widely used. However, a low-dose technique should be applied for the examination since a lot of radiation exposure to the patient may cause secondary damage for the patients. Therefore, the degradation of the measured CT images may interferes with a clinical check in that blood vessel shapes on the CT image are significantly affected by gaussian noise. In this study, we employed the spatio-temporal technique to analyze dynamic (brain perfusion) CT data to improve an image quality for successful clinical diagnosis. As a results, proposed technique could remove gaussian noise successfully, demonstrated a possibility of new image segmentation technique for CT angiography. Qualitative evaluation was conducted by skilled radiological technologists, indicated significant quality improvement of dynamic CT images. the proposed technique will be useful tools as a clinical application for brain perfusion CT examination.

Clinical Analysis of Primary Mediastinal Tumors (원발성 종격동 종양의 임상적 고찰)

  • 변정욱;조창욱
    • Journal of Chest Surgery
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    • v.30 no.1
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    • pp.55-60
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    • 1997
  • We reviewed 40 cases of primary mediastinal tumors which were operated on at Seoul Paik Hospital from September, 1987 to December, 1995. Of these, 18 were male and 22 were female. The patient ranged in age from 4 years to 68 years with a mean age of 34.1 years. The most common symptoms included chest pain(12.5%), cough(12.5%), dyspnea(7.5%). and palpable neck mass(7.5%), and symptoms were absent at the time of diagnosis in 37.5% of cases. Chest roentgenography and computed tomography(CT) were performed in all patients, and magnetic resonance imaging(MRI) in 5 patients, and transthoracic needle aspiration (TTNA) performed In 22 patients. The sensitivity of TTNA was 72.7%(16 of 22 patients). The lesion was located 60% in the anterosuperior mediastinum, 35% in the posterior mediastinum, and 5% in the middle mediastinum. The primary tumors included thymic neoplasms(11 cases), germ cell tumors(7 cases), neurogenic tumors(10 cases) and a miscellaneous group. The malignant tumors(12.5%) were invasive thymoma(3 cases), spindle cell sarcoma(1 case), and non-Hodgkin's Iymphoma(1 case). A complete excision was done in all 35 benign tumors and 3 malignant tumors. There was no operative mortality, and postoperative complications occurred in 3 cases.

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Usefulness of $^{99m}Tc-HMPAO$ SPECT in the Localization of the Epileptic focus in Temporal Lobe Epilepsy: Comparison with EEG, MRI and CT (측두엽성간질의 간질 병소 편측화에서 $^{99m}Tc-HMPAO$ SPECT의 유용성: 뇌파, 자기 공명 영상 및 전산화 단층 영상과의 비교)

  • Kim, Jong-Ho;Kim, Jong-Soon;Kim, Sang-Eun;Choi, Chang-Woon;Lee, Dong-Soo;Chung, June-Key;Lee, Myung-Chul;Koh, Chang-Soon;Lee, Nam-Soo;Myung, Ho-Jin
    • The Korean Journal of Nuclear Medicine
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    • v.25 no.1
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    • pp.17-26
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    • 1991
  • 뇌 혈류의 기능적 영상화는 간질병소의 국소화에 이용되고 있으며 측두엽성간질의 편측화에 여러가지 진단 방법이 이용되고 있으나 만족할만한 결과를 보이지 못하고 있다. 최근 PET또는 SPECT를 이용하여 측두엽성간질에서 발작 간에 측두엽 병소의 대사율 및 혈류의 감소가 나타나며, 이러한 소견은 발작 유발 병소의 편측화에 매우 유용할것이라는 보고들이 있다. 저자들은 측두엽성간질에서 간질 병소를 편측화 하는데에 $^{99m}Tc-HMPAO$ SPECT의 유용성을 평가 하고자 측두엽성간질 31예에서 발작 간의 $^{99m}Tc-HMPAO$ SPECT 소견, 뇌파, 자기 공명 영상 및 전산화 단층 소견을 비교하였다. SPECT 소견에 따른 나이, 병력 기간과 병발시 나이 등의 임상 지수 간에는 유의한 차이가 없었다. 31예의 환자중 23예에서(74.2%) 국소 뇌 혈류 감소를 보였으며 17예(54.8%)에서 측두엽에 관류 감소가 관찰 되었다. 비인두 뇌파 표준 뇌파는 24예(77.4%)에서 측두엽에 편측화를 보였으며 SPECT와 뇌파 양자가 모두 편측화된 경우 일치도는 8/12예 (66.7%) 였다. 16예에서 시행된 전산화 단층 영상은 모두 편측화를 보이지 못했으며 27예에서 시행된 자기 공명 영상에서는 단지 1예에서 편측화를 보였다. 이상의 결과로서 발작 간의 $^{99m}Tc-HMPAO$ SPECT는 측두엽성간질 병소의 편측화에 유용한 보조 검사로 생각된다.

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A Case of Childhood Cerebral Form Adrenoleukodystrophy with Novel Mutation in the ABCD1 Gene (새로운 ABCD1 유전자의 돌연변이를 가지는 소아 대뇌형 부신백질이영양증 1례)

  • Shin, Young-Lim
    • Journal of The Korean Society of Inherited Metabolic disease
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    • v.12 no.1
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    • pp.49-53
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    • 2012
  • X-linked adrenoleukodystrophy (ALD) is a rare inherited metabolic disease which results in impaired peroxisomal ${\beta}$-oxidation and the accumulation of very long chain fatty acids (VLCFA) in the adrenal cortex, the myelin of the central nervous system, and the testes. X-linked ALD is caused by mutations in the ABCD1 gene encoding an ATP-binding cassette transporter superfamily located in the peroxisomal membrane. This disease is characterized by a variety of phenotypes. The classic childhood cerebral ALD is a rapidly progressive demyelinating condition affecting the cerebral white matter before the age of 10 years in boys. We report the case of a 8-year-old with childhood cerebral X-linked ALD who developed inattention, hyperactivity, motor incoordination and hemiparesis. We diagnosed ALD with elevated plasma very long chain fatty acid level and diffuse high signal intensity lesions in both parieto-occipital white matter and cerebellar white matter in brain MRI. We identified a novel c.983delT (p.Met329CysfsX7) mutation of the ABCD1 gene. There is no correlation between X-ALD phenotype and mutations in the ABCD1 gene. Further studies for searching additional non-genetic factor which determine the phenotypic variation will be needed.

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Study on 3D Printer Production of Auxiliary Device for Upper Limb for Medical Imaging Test (의료영상 검사를 위한 상지 보조기구의 3D 프린터 제작 연구)

  • Kim, Hyeong-Gyun;Yoon, Jae-Ho;Choi, Seong-Dae
    • Journal of radiological science and technology
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    • v.38 no.4
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    • pp.389-394
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    • 2015
  • There is a progressive development in the medical imaging technology, especially of descriptive capability for anatomical structure of human body thanks to advancement of information technology and medical devices. But however maintenance of correct posture is essential for the medical imaging checkup on the shoulder joint requiring rotation of the upper limb due to the complexity of human body. In the cases of MRI examination, long duration and fixed posture are critical, as failure to comply with them leads to minimal possibility of reproducibility only with the efforts of the examiner and will of the patient. Thus, this study aimed to develop an auxiliary device that enables rotation of the upper limb as well as fixing it at quantitative angles for medical imaging examination capable of providing diagnostic values. An auxiliary device has been developed based on the results of precedent studies, by designing a 3D model with the CATIA software, an engineering application, and producing it with the 3D printer. The printer is Objet350 Connex from Stratasys, and acrylonitrile- butadiene-styrene(ABS) is used as the material of the device. Dimensions are $120{\times}150{\times}190mm$, with the inner diameter of the handle being 125.9 mm. The auxiliary device has 4 components including the body (outside), handle (inside), fixture terminal and the connection part. The body and handle have the gap of 2.1 mm for smooth rotation, while the 360 degree of scales have been etched on the handle so that the angle required for observation may be recorded per patient for traceability and dual examination.

Evaluation of the Fetal Dose during Prophylactic Placement of Internal Iliac Artery Balloon Occlusion Catheters in Placenta Accreta (유착태반환자의 예방적 내장골동맥 풍선카테터 설치술 시행 시 태아선량 평가)

  • Kim, Dong-Sik;Ahn, Sung-Min
    • Journal of radiological science and technology
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    • v.39 no.3
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    • pp.313-321
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    • 2016
  • Placenta accrete patients whose mother mortality rates are rather high due to massive bleeding during childbirth need to have Prophylactic placement of Internal Iliac Artery Balloon Occlusion Catheters procedure to reduce amount of blood loss and inoperative transfusion. Nevertheless, studies for mothers inevitably exposed to dose during PIIABOCs procedure have not been published many yet. Therefore, this study is to investigate exact information on radiation dose exposed to fetus during PIIABOCs procedure. Average effective dose of fetus per organ is 2.38~8.83 mGy, measured highest at beam center and followed by eyeball, stomach and bladder. The result showed that the longer fluoroscopy time is used, the closer beam center is and the thicker abdominal thickness is, the more effective dose on fetus is increasing. When using the collimator and protection shown to decrease the effective dose and when using higher the patient table shown to decrease the effective dose. It has been reported that the threshold of deterministic effect is about 100mGy. Deterministic effect was regarded as a factor that would influence on fetus exposed by medical radiation than stochastic effect. Consequently, it concluded that dose exposed on fetus in PIIABOCs procedure was approximately 10% of threshold of deterministic effect with effective dose of 0.49~18.27 mGy.

Clinical Study on 32 Patients of Lumbar Herniated Intervertebral Disc with Spondylolisthesis (척추전방전위증을 동반한 요추간판 탈출증 환자 32례에 대한 한의학적 임상고찰)

  • Lee, Han;Jung, Ho-Suk;Kim, Sang-Joo;Kim, Eun-Seok;Han, Kyung-Wan;Woo, Jae-Hyuk;Lee, Joon-Seok;Lee, Seul-Ji;Lee, Seon-Goo;Cha, Yun-Yeop
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.24 no.6
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    • pp.1087-1093
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    • 2010
  • The purpose of this study is to survey the effectiveness of oriental medicine treatment on lumbar herniated intervertebral disc and spondylolisthesis. The clinical study was performed on 32 cases of patients with lumbar herniated intervertebral disc and spondylolisthesis as diagnosed by X-ray, Magnetic resonance imaging(MRI) exams amongst the patients who were admitted to Jaseng Hospital of Oriental Medicine from January 2010 to June 2010. 32 cases of patients were analyzed according to the distribution of sex, age, duration of disease, contributory factor, symptoms, admission period, disc herniation type and level of spondylolisthesis. The efficacy of treatment was evaluated respectively. The number of the female patients were larger than that of male with the ratio of 1:0.6. Most of the patients were in their fifties(43.8%), choronic phase(46.9%), those patients suffered from lower back pain and leg pain radiation(90.6%), reasons unknown(56.3%). Most of them also had mixed disc(37.5%), bulging disc(37.5%) and spondylolisthesis of LS on L5(50.0%). Most of them stayed in the hospital for 21-25days. After treatment, the percentage with good improvement was 62.5%, fair 18.8%, poor 12.5%, and excellent 6.3%, respectively. Oriental medicine treatment has on useful effect on the recovery of lumbar herniated intervertebral disc with spondylolisthesis.

The Study on Reduction of Image Distortion by using Single-Shot Turbo Spin Echo in Brain Stem Diffusion MRI (자기공명 확산강조영상검사 시 영상왜곡 감소에 관한 연구)

  • Choi, Kwan-Woo;Lee, Ho-Beom;Na, Sa-Ra;Yoo, Beong-Gyu;Son, Soon-Yong
    • Journal of the Korean Society of Radiology
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    • v.10 no.4
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    • pp.279-284
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    • 2016
  • Single-shot echo planar imaging(SS-EPI) is well established as high sensitivity for ischemic stroke. However, it is prone to susceptibility artifact in brain stem that diminish the image quality. single-shot turbo spin echo(SS-TSE) is a new DWI technique that can reduce susceptibility artifact. Thus, this research was conducted so as to reduce geometric distortion in brain stem by using single-shot turbo spin echo technique. Thirty patients without brain disease underwent diffusion MR on a 3T scanner with SS-EPI and SS-TSE. Obtained images with both sequences were analyzed for geometric distortion and error percentage as well. Image quality in terms of geometric distortion of SS-TSE were found to be significantly better than those for SS-EPI. And error percentage was considerably reduced for 2.4% of b0 image(from 11.1% to 8.7%), 1.2% of b1000 image(from 11.4% to 10.1%), respectively. In summary, diffusion MR using SS-TSE significantly reduce geometric distortion compared to SS-EPI in brain stem and may provide improved diagnostic performance.

The Usefulness of $^{99m}Tc$-Sestamibi Scan in Preoperative Localization in Primary Hyperparathyroidism (원발성 부갑상선 기능 항진증의 수술전 병소확인에서 $^{99m}Tc$-Sestamibi 스캔의 유용성)

  • Baik, S.H.;Kim, S.M.;Choi, K.M.;Choi, Y.S.;Kim, S.J.;Yu, J.M.;Choi, D.S.;Choe, J.C.
    • The Korean Journal of Nuclear Medicine
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    • v.29 no.4
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    • pp.465-472
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    • 1995
  • An accurate preoperative localization in patients with primary hyperparathyroidism is important for successful surgical intervention. There are many methods for the localization of the primary hyperparathyroidism such as ultrasonography, computerized tomography(CT), magnetic resonance imaging(MRI), angiography and $^{201}T1/^{99m}Tc$ subtraction scan. Among them $^{201}T1/^{99m}Tc$ subtraction scan is known as the most accurate tool for preoperative localization. Recently $^{99m}Tc$-Sestamibi has been used for parathyroid gland imaging. We experienced 19 primary hyperparathyroidisms accurately localized with $^{201}T1/^{99m}Tc$ subtraction imaging and $^{99m}Tc$-Sestamibi. The sensitivities of the $^{99m}Tc$-Sestanibi, $^{201}T1/^{99m}Tc$ subtraction imaging, CT and US were 100%(5/5), 89.5%(17/19) and 61.7(12/19) respectively. With the combination of $^{99m}Tc$-Sestamibi and $^{201}T1/^{99m}Tc$ subtraction imaging we could localize with 100% accuracy. Although the case number is small, this study suggests that the $^{99m}Tc$-Sestamibi parathyroid scan is very useful and easy to use for preoperative localization in primary hyperparathyroidism.

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