1.CT findings of early acute cerebral infarction.
Tae Hoon KIM ; Woo Suk CHOI ; Kyung Nam RYU
Journal of the Korean Radiological Society 1992;28(6):844-850
The CT findings of the acute cerebral infarction are well known. However the CT findings of early stroke within 24 hours of the onset have not been sufficiently reported. The purpose of this study is to evaluate early acute cerebral infarction on CT within 24 hours after ictus. The early and accurate CT diagnosis could lead to the appropriate therapy and improved outcome of the patients. Authors retrospectively analyzed 16 patients with early acute cerebral infarction. Acute cerebral infarction was confirmed by follow-up CT in 11 patients, SPECT in 4 patients, and MRI in 1 patient. The CT findings of early acute cerebral infarction include effacement of cortical sulci or cistern (n=16, 100%), hyperattenuation of MCA (n=3), obscuration of lentiform nucleus (n=6), loss of insular ribbon (n=6) and subtle low density in hemisphere (n=5). The most frequent findings was effacement of cortical sulci in our study, and it was though to be the most important sign of early acute cerebral infarction.
Cerebral Infarction*
;
Corpus Striatum
;
Diagnosis
;
Follow-Up Studies
;
Humans
;
Magnetic Resonance Imaging
;
Retrospective Studies
;
Stroke
;
Tomography, Emission-Computed, Single-Photon
2.Reconstruction of extensive scalp defect using free latissimus dorsi muscle flap.
Byung Hoon RYU ; Young Seob LEE ; Yang Woo KIM
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1991;18(1):95-100
No abstract available.
Scalp*
;
Superficial Back Muscles*
3.Clinical Result of Planned posterior Continuous Curvilinear Capsulorrhexis in Adult Cataract patients: 1 year follow-up.
Chang Hoon RYU ; Hong Bok KIM ; Seung Jeong LIM
Journal of the Korean Ophthalmological Society 2000;41(12):2547-2554
No Abstract Available.
Adult*
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Capsulorhexis*
;
Cataract*
;
Follow-Up Studies*
;
Humans
4.Resurfacing of the hand using free temporoparietal fascial flap.
Young Seob LEE ; Yang Woo KIM ; Byung Hoon RYU
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1992;19(2):252-257
No abstract available.
Hand*
5.Results of Experimental Canine Gastric Wall Ligation using 0-shaped Rubber Band.
Jin Hai HYUN ; Ho Sang RYU ; Chang Duck KIM ; Hoon Jai CHUN ; Han Kyum KIM
Korean Journal of Gastrointestinal Endoscopy 1996;16(2):145-155
Objectives: Endoscopic variceal ligation is well established metbod of treatment for esophageal varices whereas for gastric varices there has not been any systematic report of its use as a method of treatment. To evaluated its possible clinical application, the band ligation(banding) and the method of band ligation in conjuction with submucosal ethanolamine injection(banding with sclero) were tested on canine stomach, and results were assessed.
Esophageal and Gastric Varices
;
Ethanolamine
;
Ligation*
;
Rubber*
;
Stomach
6.Angiographic analysis of avascular necrosis of a femoral head -selective angiography of medial femoral circumflex artery-.
Kyung Nam RYU ; Yup YOON ; Sun Wha LEE ; Jae Hoon LIM
Journal of the Korean Radiological Society 1991;27(4):547-551
No abstract available.
Angiography*
;
Head*
;
Necrosis*
7.MR findings of spinal epidural mass.
Tae Hoon KIM ; Woo Suk CHOI ; In Soo SHIN ; Kyung Nam RYU ; Yup YOON
Journal of the Korean Radiological Society 1993;29(5):907-913
We analyzed the MR findings of spinal epidural mass in 23 patients retrospectively. MR images were performed at 1.5T unit. The lesions were confirmed as metastasis(12 cases), lymphoma (2 cases), leukemia(1 cases), multiple myeloma(2 cases), meningioma(3 cases), neurofibroma(1 case), dysraphism with lipoma(1 case) and lipomatosis(4 cases), Most MRI examinations consisted of T1, proton density and T2 weighted sagittal imaging of the spine, with additional pulse sequences or image planes as needed for clarification. The level of the spinal epidural mass was cervical spine level in 2 cases, thoracic in 15 cases, lumbar in 7 cases, and sacral in 2 cases. The location of epidural mass within the spinal canal was eccentric in 20 cases, multiple in 2 cases, and encircled in 4 cases. Paraspinal mass was seen in 11 cases. Signal intensity of epidural mass was variable. The marrow of spine revealed low signal intensity(SI) on TIWI and high SI on T2WI in 14 cases. In conclusion, MRI is a useful diagnostic tool for the evaluation of spinal epidural mass.
Bone Marrow
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Humans
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Lymphoma
;
Magnetic Resonance Imaging
;
Protons
;
Retrospective Studies
;
Spinal Canal
;
Spine
8.The Production and Evaluation of the Tissue-equivalent Phantom for the Magnetic Resonance Imaging.
Young Hoon RYU ; Jae Hyun CHO ; Jin Suck SUH ; Jae Myun LEE ; Eun Kee JEONG
Journal of the Korean Radiological Society 1994;30(6):1151-1155
PURPOSE: For the production and evaluation of the tissue-equivalent phantom. MATERIALS AND METHODS: We used agarous gel and oil as a basic component of the mixture and added Tween 80 for the stabilization of phantoms. We did the test for homogeneity and measured T1 and T2 relexation times of each phantom tube. RESULTS: T1 relaxation time ranged from 642 to 2781 msec and T2 relaxation times from 42 to 157 msec. Each phantom was significantly different in T1 relaxation time and T2 relaxation time (p < .0001). CONCLUSION: Tissue equivalent phantom may provide good information on the optimal sequence before MR imaging of patients and may be valuable if it is used with the patients' MR imaging.
Agar
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Humans
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Magnetic Resonance Imaging*
;
Polysorbates
;
Relaxation
9.Clinical charateristics of pregnancy-induced hypertensive mothers and their neonates.
Soo Jeong RYU ; Jin Sook KIM ; Kyong Hoon CHOI ; Myong Jin KIM ; Mi Na LEE
Journal of the Korean Pediatric Society 1991;34(7):929-933
No abstract available.
Humans
;
Infant, Newborn*
;
Mothers*
;
Thrombocytopenia
10.The Effect of Recombinant Human Growth Hormone on Neutrophil Activity in Children.
Hun Taeg CHUNG ; Jong Duck KIM ; Hoon RYU ; Du Young CHOI
Korean Journal of Immunology 1997;19(4):629-638
We investigated the acute effect of recombinant human growth hormone (rhGH) on the activity of polymorphoneuclear leukocyte (PMN). We selected 6 patients of growth hormone deficient and 5 normal control children. In both groups, 0.15 IU/kg of rhGH was administered subcutaneously. The plasma growth hormone level were measured by radioimmunoassay on 0, 2, and 6 hours after administration of rhGH. To determined PMN activity, peripheral blood PMN were separated by discontinuous density-gradient centrifigation. Isolated PMN were stimulated hy fMLP and PMA and then respiratory burst activity of PMN was determined. The average growth hormone level of growth horrnone deficient and normal group were increased to the level of 41.6+/-23.7 and 96.3+/-46.5 ng/ml respectively, 2 hours after rhGH injection and decreased to the level of 18.5+/-10.6 and 42.2+/-5.5 ng/ml respectively, 6 hours after rhGH injection. Superoxide (O ) production by PMN which was stimulated by PMA was increased from 9.98+/-5.18 to 38.67+/-19.19 (x 10'cpm) after 6 hours of rhGH injection in control group children. It seemed that administration of the rhGH do not made a any effects acutely on PMN activity in growth hormone deficient group. But in a normal control children, extemal administration of rhGH acutely increased activity of PMN.
Child*
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Growth Hormone
;
Human Growth Hormone*
;
Humans*
;
Leukocytes
;
Neutrophils*
;
Plasma
;
Radioimmunoassay
;
Respiratory Burst
;
Superoxides