두 개내 핍지신경교종의 전산화단층 촬영 소견 고찰

최영칠 대한영상의학회 1989 대한영상의학회지 Vol.25 No.5

Intracranial oligodendrogliomas show relatively low incidence among the intracranial tumors and difficult to differentiation with the other brain tumors, CT Plays and important role in the diagnosis of these lesions. Authors reviewed the 16 cases of pathologicaly proven oligodendrogliomas at Korea univer-sity medical center for recent 7 years and the results were as follows: 1. They showed biphasic age distribution one peak in 2nd decade and another in 5th decade. 2. 14 cases (88%) located supratentorially and frequent in frontal lobe of the patient age over 20(6/8) frequent in parietal lobe below 20(4/6) 3. Generally the tumors composed of solid portion but they almost always had some cystic or degenerative portion. 4. The diameter of the tumors varied from 2.5cm to 8 cm 5. The tumor calcification on CT scans were found in 14 cases and appearences were; 1) large irregular nodular calcifications ; 5 cases 2) small nodular calcification ; 4 cases 3) scatteren stippled calcifications; 4 cases 4) shell like incomplete circular calcifiations; 2 cases 6. 14 cases (88%) showed contrast enhanement irregular enhancement in 5 case diffuse enhancement in 4 cases and ring like enhancement pattern in 5 cases .

석회화의 종류와 농도에 따른 CT와 MRI 분석

최영칠,신현준,최진영 대한신경과학회 2009 대한신경과학회지 Vol.27 No.2

Background: High-density calcifications on CT images can appear as high signals on T1-weighted MR images, but with differing extents and degrees. This study investigated CT and MR images of calcifications of various types and concentrations. Methods: We analyzed CT and MR images of two cases of bilateral basal ganglia calcifications and experimental suspensions of calcifications of different types and concentrations. Results: The density of CT calcifications increased in proportion to their concentration regardless of their type. However, the MR signals differed with the types and concentrations of calcification. A high signal was one of the most noticeable signs on T1-weighted MR images for calcium phosphate, and it increased for concentrations up to 0.2 g/mL before leveling off. The signal for all types of calcification decreased on T2-weighted and especially fluid-attenuated inversion recovery (FLAIR) images. Conclusions: High signals are characteristic of calcification on T1-weighted MR images, and are often stronger than those on CT images. A low signal appears consistently on FLAIR MR images regardless of the calcification type. These findings might be helpful in evaluating calcifications apparent in MR images. Background: High-density calcifications on CT images can appear as high signals on T1-weighted MR images, but with differing extents and degrees. This study investigated CT and MR images of calcifications of various types and concentrations. Methods: We analyzed CT and MR images of two cases of bilateral basal ganglia calcifications and experimental suspensions of calcifications of different types and concentrations. Results: The density of CT calcifications increased in proportion to their concentration regardless of their type. However, the MR signals differed with the types and concentrations of calcification. A high signal was one of the most noticeable signs on T1-weighted MR images for calcium phosphate, and it increased for concentrations up to 0.2 g/mL before leveling off. The signal for all types of calcification decreased on T2-weighted and especially fluid-attenuated inversion recovery (FLAIR) images. Conclusions: High signals are characteristic of calcification on T1-weighted MR images, and are often stronger than those on CT images. A low signal appears consistently on FLAIR MR images regardless of the calcification type. These findings might be helpful in evaluating calcifications apparent in MR images.

Wilson-Mikity 증후군의 고해상 CT 추적검사 소견: 증례 보고

최영칠,홍성진,신현준 대한영상의학회 2005 대한영상의학회지 Vol.53 No.5

Wilson-Mikity Syndrome, a form of chronic lung disease, is rarely developed with the widespread use of mechanical ventilaton. There has always been difficulty distinguishing it from bronchopulmonary dysplasia. The etiology and pathogenesis of this disease are still unknown. There are no reports in Korean literature about high-resolution (HR) CT follow-up of this disease. Diffuse interstitial thickening, which was noted on the initial examination, decreased, but some focal hyperinflations remained on follow-up HRCT. Further studies with HRCT will help to understand the progression of the disease, and will help to develop treatment and management programs. Wilson-Mikity 증후군은 폐기관지 이형성증과 감별을 요하는 미숙아의 만성 폐질환의 하나로 기계적환기의 사용이 보편화된 지금은 흔하지 않은 질환이며 원인이나 병리는 아직 뚜렷하게 밝혀지지 않았다. 이 질환의 고해상 CT 추적검사에 관한 논문은 국내에서는 보고된 바가 없었다. 추적검사에서 처음에 보였던 미만성 간질의 비후는 점차 소실되나 부분적 과호흡의 양상은 지속되었다. 이 질환의 고해상 CT 추적검사는 시기에 따른 변화를 알고 환자의 치료와 관리에 도움을 줄 수 있다고 생각하여 문헌고찰과 함께 보고한다.

경추 MRI검사에서 경사 시상면 촬영의 의의 : 임상소견 및 근전도 검사소견과의 비교

최영칠,이창희,신현준 건국대학교 의과학연구소 2001 건국의과학학술지 Vol.11 No.-

MRI is the most valuable imaging study in evaluation of spines. But conventional 2 dimension MR evaluation with axial and sagittal images of cervical neural foramen is limited by section thickeness, signal-to-noise problems, CSF flow artifacts and oblique direction of neural foramina. We added oblique sagittal images in the cervical MRI study of 32 patients and compared the MRI findings to clinical symptoms and the EMG results. The results were as follows. 1.The neck pain had correlations with the MRI findings as central disc protrusion and maximal cord compression (p<0.05). 2.The radiating pain had significant correlations with the MRI findings of foraminal narrowings on oblique sagittal images(p<0.01). 3.The radiculopathy on the EMG study had significant correlations with the MRI findings of foraminal narrowing on oblique sagittal images.

요통 환자에서 요통 및 방사통과 요추 자기공명영상의 이상소견에 대한 Tree모형의 활용

최영칠,손은주,이태용 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

To detect the MRI findings related to The low back pain and sciatica according to age group, authors used tree model analysis of 80 patient's grading their low back pain and sciatica, with their lumbar MRI findings. And the results were as follows: 1. In teens and twenties(n=22), the low back pain was related to high maximum of spinal canal narrowing and large sum of disc degeneration, and the sciatica was related to the psoas spine ratio. 2. In thirties and forties(n=33), the sum of disc degeneration, the sum of foraminal narrowing, the maximum of disc degeneration affected the low back pain, and the sum of disc degeneration, disc herniation and maximum of canal narrowing were related to sciatica. 3. In fifties and sixties(n=23) the low back pain was related to large sum of foraminal narrowing and small psoas spine ratio, and thesciatica was largely affected by high maximum of foraminal narrowing and some by large sum of canal narrowing and large sum of disc degeneration.

신생아의 두뇌 초음파검사상 뇌실주위 고반향음영에 관한 연구

최영칠,이태용,조영채,이동배 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

Neurosonography is an excellent modality for imaging a wide array of intracranial pathology of the infant and the newborn. Periventricular high echos were prominent for the premature infant, but there are some difficulties in differentiate normal periventricular high echo from periventricular leukomalacia. White matter indices on neurosonography of 152 healthy newborn babies were measured and analized, with their gestational age, method of delivery, birth weight, APGAR score(1 min and 5 min), diagnosis and labaratory data. The gestational age of babies at birth (p=0.0001) and the delivery with Caesarian section (p=0.0263) were related statistcally to high white matter index. The babies with metabolic disease had higher white matter index than other disease group or normal control group. On the basis of these results, We speculate that in addition to gestational age of infants, delivery method and their disease status may play an additional role in presenting ldgh periventricular echo on neurosonography. It is possible to predict the size of non pathologic periventricular high echo and to give more information for further study plan.

신생아의 골밀도와 관계된 방사선학적 변화에 관한 연구

최영칠 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.- No.7

산·학·연·관 협동을 통한 지역중소기업 육성방안

최영칠 전남대학교기업경영연구소 1997 經營情報 Vol.8 No.1

최근 세계 경제환경은 세계무역기구(WTO)체제의 정착과 정보통신기술의 비약적인 발전 등으로 물리적인 국경의 개념이 허물어지면서 이른바 국경없는 경제(boderless economy)시대를 맞고 있다. 특히 우리경제는 대외적으로는 지난해 OECD가입으로 개방화, 국제화가 가속화되면서 무한경쟁시대의 파고에 휘말라고 있으며 대내적으로는 지방화시대의 본격화로 지역간 균형발전에 대한 요구가 점증되고 있다.

신생아 고해상 뇌 초음파검사에서 대상고랑의 깊이와 재태기간과의 관계

최영칠,최진영,이정화 대한소아청소년과학회 2009 Clinical and Experimental Pediatrics (CEP) Vol.52 No.10

Purpose:It is critical that the exact gestational age of a newborn baby, especially premature baby, be determined to evaluate the status of a disease and its management and to estimate the prognosis of a patient. This study aimed to investigate an easy and accurate method to estimate gestational age on cranial ultrasound, requiring minimal additional time and equipment. Methods:A high-resolution coronal sonographic image was obtained via the anterior fontanel with a 5-12 Mhz linear probe after the usual cranial sonographic examination. We measured the depth of cerebral hemisphere, thickness of corpus callosum, and depth of cingulate sulcus and obtained the correlations between these factors and gestational age. Results:Depth of cingulate sulcus had the highest correlation coefficiency with gestational age (r=0.878, P=0.000). All the cases, except for 2 cases, had a gestational age of more than 37 weeks, when the depths of cingulate sulcus were more than 0.55 cm, and had a gestational age less than 34 weeks, when the depths of cingulate sulcus were less than 0.35 cm. Conclusion:Measurement of the depth of cingulate sulcus was a simple and accurate method to estimate the gestational age on cranial ultrasound. The gestational age is more than 37 weeks, when the depth of cingulate sulcus is more than 0.55 cm, and is less than 34 weeks, when the depth of cingulate sulcus is less than 0.35 cm. 목적:신생아, 특히 미숙아에서 재태기간의 정확한 측정은 환자의 상태와 질병을 이해하여 치료하고 예후를 예상하는데 필수적이다. 이에 저자들은 신생아 뇌 초음파 검사시 최소한의 시간과 기구의 추가 사용으로 간편하게 정확한 재태기간을 추정할 수 있는 방법을 연구하였다. 방법:일반적인 뇌 초음파 검사를 시행한 후 5-12 Mhz의 고해상도 선형 탐촉자를 사용하여 대천문을 통하여 관상면의 영상을 얻었고 여기에서 대뇌반구의 깊이와 뇌량의 두께 및 대상고랑의 깊이를 측정하여 재태기간과의 상관관계을 구하였다. 결과:대뇌반구의 깊이, 뇌량의 두께 및 대상고랑의 깊이 중 재태기간과 가장 상관관계가 높은 측정치는 대상고랑의 깊이로 Pearson 상관계수 0.878을 보였다(P=0.000). 또한 대상고랑의 깊이가 0.55 cm 이상인 경우 단 두 례를 제외하고 모두 재태기간이 37주 이상이었고 대상고랑의 깊이가 0.35 cm 미만인 경우는 모두 34주 미만이었다. 결론:고해상도 뇌 초음파 검사를 통해 측정된 대상고랑의 깊이는 신생아의 정확한 재태기간 측정에 유용하게 이용될 수 있다. 그러나 보다 더 많은 수의 신생아를 대상으로 한 대규모 연구가 필요할 것으로 생각된다.

신생아의 골밀도와 관계된 방사선학적 변화에 관한 연구

최영칠 건국대학교 의과학연구소 1997 건국의과학학술지 Vol.7 No.-

Changes in bone denity were recognized in the long bones (humerus) of premature babies on plain x-ray radiographs of chests in short term interval. This study was designed to estimate the osteopenia of premature babies and to find reliable causes of osteopenia. Plain x-ray radiographies of 20 premature babies (group A) were taken on the day of birth and about 10 day after birth. The humeral cortial indeces and the patterns of bone density were evaluated each time. Gesational age, birth weight. duration of total parenteral nutrition and duration of phototherapy of subjective babies were recorded. For comparison, 20 term babies (group B) were studied, too. Stastistical significances were noted between the changes of bone density and gestational age and birth weight (P=0.0064, 0.0007). Decreased bone density were seen in premature babies in short interval. There is a significant relation between changes of bone density and durations of phototherapy (P=0.0233)