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Bahk, Yong Whee,Lee, jae Mun CATHOLIC MEDICAL CENTER 1983 Bulletin of the Clinical Research Institute Vol.11 No.1
In order to set up a baseline of the normal internal architecture of the lumbar discs, 127 lumbar discs of 30 normal adult subjects were studied by the measure set technique. The internal architectures of each disc were classified into 3 types; well-defined, intermediate, and diffuse type. With age, the internal architecture of the lumbar disc changed from the well-defined through the intermediate to diffuse type, representing degenerative change. The diffuse type was most frequently seen in the discs of L4-5 and L5-S1, suggesting the maximum intensity of stress and strain due to weight bearing at these levels.
Bahk, Yong-Whee,Hwang, Seok-Ha,Lee, U-Young,Chung, Yong-An,Jung, Joo-Young,Jeong, Hyeonseok S. Williams & Wilkins Co 2017 Medicine Vol.96 No.45
<▼1><P>Supplemental Digital Content is available in the text</P></▼1><▼2><P><B>Abstract</B></P><P>We prospectively performed gamma correction pinhole bone scan (GCPBS) and histopathologic verification study to make simultaneous morphobiochemical diagnosis of trabecular microfractures (TMF) occurred in the femoral head as a part of femoral neck fracture.</P><P>Materials consisted of surgical specimens of the femoral head in 6 consecutive patients. The specimens were imaged using Tc-99m hydroxymethylene diphosphonate (HDP) pinhole scan and processed by the gamma correction. After cleansing with 10% formalin solution, injured specimen surface was observed using a surgical microscope to record TMF. Morphological findings shown in the photograph, naive pinhole bone scan, GCPBS, and hematoxylin-eosin (H&E) stain of the specimen were reciprocally correlated for histological verification and the usefulness of suppression and enhancement of Tc-99m HDP uptake was biochemically investigated in TMF and edema and hemorrhage using gamma correction.</P><P>On the one hand, GCPBS was able to depict the calcifying calluses in TMF with enhanced Tc-99m HDP uptake. They were pinpointed, speckled, round, ovoid, rod-like, geographic, and crushed in shape. The smallest callus measured was 0.23 mm in this series. On the other hand, GCPBS biochemically was able to discern the calluses with enhanced high Tc-99m HDP uptake from the normal and edema dipped and hemorrhage irritated trabeculae with washed out uptake.</P><P>Morphobiochemically, GCPBS can clearly depict microfractures in the femoral head produced by femoral neck fracture. It discerns the microcalluses with enhanced Tc-99m HDP uptake from the intact and edema dipped and hemorrhage irritated trabeculae with suppressed washed out Tc-99m HDP uptake. Both conventional pinhole bone scan and gamma correction are useful imaging means to specifically diagnose the microcalluses naturally formed in TMF.</P></▼2>
Radiographic Findings in the Pulmonary Diseases of Infants Weighing Under 1500 Grams at Birth
Bahk, Yong Whee,Park, Jeong Mi,Kim, Ok Hwa CATHOLIC MEDICAL CENTER 1991 Bulletin of the Clinical Research Institute Vol.19 No.2
Since the introduction of intensive perinatal care, the survival rate of infants weighing less than 1500 gm at birth has improved substantially. However, the pulmonary diseases remain to be the major causes of the high mortality of these low birth weight infants. In order to systematically assess an epidemiologic distribution of the pulmonary diseases in these very low weight prematures, we have analyzed the chest x-rays of 102 infants weighing less than 1500 gm. These consisted of 30 with extreme low birth weight (ELBW) weighing less than 1000 gm and 72 with very low birth weight (VLBW) weighing 1001~1500 gm. The survival rate of ELBW and VLBW was 10% and 49%, respectively. Seventy of 102 infants had abnormal findings in the chest x-ray. Forty-eight had idiopathic respiratory distress syndrome (IRDS). Seven out of 48 infants with IRDS had persistent ductus arteriosus, and in only 2 (30%) of 7 cases were alive. Endotracheal intubation and assisted ventilation application for the treatment of IRDS resulted in pulmonary interstitial emphysema in 4 infants and pneumothorax and /or pneumomediastinum in 4 infants. Displacement of endotracheal intubation showed lobar and/or unilateral lung atelectasis in 8 infants and a case of accidental dislodgement of intubation tube into the esophagus resulted in air esophagogram and worsened lung aeration. In spite of the development of many sophisticated methods of diagnostic radiology, the chest x-ray was still the most valuable yet simple way of evaluating the pulmonary problems in these extreme and very low birth weight prematures.
A Radiological Study on Collateral Vessels in Occlusive Arterial Disease
Bahk, Yong Whee,Shinn, Kyung Sub CATHOLIC MEDICAL CENTER 1973 Bulletin of the Clinical Research Institute Vol.1 No.1
The purpose of the present study is to assess the characteristics of collateral formations in the patients with occlusive arterial disease. The collateral arteries were analysed quantitatively in the femoral arteriograms obtained from the patients with thromboangiitis obliterans of Bu..rger.