L-형 장골이식을 이용한 구순열 비변형의 수정

유선열,박홍주,손영휘,윤천주,박충열,송종운,이용욱 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.6

Patients with a cleft lip nasal deformities hope for a pleasing nasal profile, a well-defined angular nasal tip, and symmetry of the nose. The main objective of the correction of cleft lip nasal deformity is to achieve nasal symmetry and an improved nasolabial relationship. The present study was carried out to assess the effect and prognosis of correction of cleft lip nasal deformity with L-shaped iliac bone graft. We performed correction surgery of the severe cleft lip nasal deformity with the autogenous L-shaped iliac bone graft in five patients and described the technique of correction. The columella portion of the L-shaped graft provided stabilization, eliminating the see-saw effect of the bridge on the bony fulcrum of the bony bridge, The disadvantage of this technique was stiffening of the nasal tip, which included the distal end of the grafted bone. However, the nasal tip gradually becomes softer, probably due to resorption of the bony edge several months after the operation. We obtained stable and symmetric reconstruction of the supporting elements of the nose. These results suggest that L-shaped iliac bone graft is stable and esthetic reconstruction method for correction of the severe cleft lip nasal deformity

서산시 산업 폐수 발생 및 처리 현황에 관한 조사연구

이영신,조용균,박철휘 한서대학교 산학협력연구원 부설 환경연구소 2000 환경연구소 논문집 Vol.3 No.-

Seosan city is facing fast industrialization, urbanization, and populization growth. It speedy changes into engineering oriented area around Dae-San engineering district causefuuture increase of general sewages and industrial waste water. the environmentally hazardous materials will also aggravate water quality of neighboring rivers and ocean. Thus, this study has been performed to investigate current lever of industrial waste water, and then project future level of those environmental damages.

Increased Uptake of 99mTc - HMPAO in 2 Cases with Meningioma

Park, Yong Ha,Park, Jung Mee,Lee, Jae Hee,Kim, Sung Hoon,Chung, Soo Kyo,Bahk, Yong Whee,Shinn, Kyung Sub 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.1

Use of Gamma Correction Pinhole Bone Scans in Trauma

Bahk, Yong-Whee,Chung, Yong-An,Park, Jung-Mee The Korea Society of Nuclear Medicine 2012 핵의학 분자영상 Vol.46 No.1

$^{99m}Tc$-hydroxydiphosphonate (HDP) bone scanning is a classic metabolic nuclear imaging method and the most frequently performed examination. Clinically, it has long been cherished as an indispensable diagnostic screening tool and for monitoring of patients with bone, joint, and soft tissue diseases. The HDP bone scan, the pinhole scan in particular, is known for its ability to detect increased, decreased, or defective tracer uptake along with magnified anatomy. Unfortunately, however, the findings of such uptake changes are not specific in many traumatic bone disorders, especially when lesions are minute and complex. This study discusses the recently introduced gamma correction pinhole bone scan (GCPBS), emphasizing its usefulness in the diagnosis of traumatic bone diseases including occult fractures; cervical sprains; whiplash injury; bone marrow edema; trabecular microfractures; evident, gaping, and stress fractures; and fish vertebra. Indeed, GCPBS can remarkably enhance the diagnostic feasibility of HDP pinhole bone scans by refining the topography, pathologic anatomy, and altered chemical profile of the traumatic diseases in question. The fine and precise depiction of anatomic and metabolic changes in these diseases has been shown to be unique to GCPBS, and they are not appreciated on conventional radiographs, multiple detector CT, or ultrasonographs. It is true that MR imaging can portray proton change, but understandably, it is a manifestation that is common to any bone disease.

일과성 뇌허혈 발작 환자에 있어서 99mTc - HMPAO 국소 뇌혈류 SPECT의 유용성

박용휘(Yong Whee Bahk),정수교(Soo Kyo Chung),이성용(Sung Yong Lee),김종우(Jong Woo Kim),박영하(Young Ha Park),안명임(Myeong Im Ahn) 대한핵의학회 1989 핵의학 분자영상 Vol.23 No.2

N/A Transient ischemic attacks (TJAs) is a syndrome resulting from brain ischemia lasting less than 24 hours. The mechanisms of TIAs may be similar to those of cerebral embolism and thrombosis, and thus TIAs may be followed by cerebral infarction. Despite the availability of CT scanning, the diagnosis and management of TIAs continue to be difficult. Recently SPECT has been advocated as a diagnostic imaging modality. We performed Tc-99m-HMPAO regional cerebral blood flow (rCRF) SPECT in 24 patients with the clinical diagnosis of TIAs to assess its ability to detect early changes of rCBF, and determine the diagnos(ic value. l en men and fourteen women with an average of 51 years (range; 27- i4 years) were i ncluded. All but 8 patients had normal brain CT prior to SPECT. The two patients had mdderate degree of hrain atrophy and the 6 patients nonspecific calcifications. Eighteen of the 24 patients had abnormal Tc-99m-HMPAO rCBF SPECT. Fifteen had unilateral involvement and the other three had bilateral involvemeots. Seventy-five percents of the defects were found in the left cerebral hemisphere. According to the distribution of the lesions (total number: 34 tesions), fourteen were in the parietal, eight in the ternporal, and the remainders were elsewhere. Tc-99m-HMPAO rCHF SPECT is sensitive in detecting vCRF abnormalities in patients with TIAs, and represent the most accurate diagnostic tool available in the diagnosis of TIAs.

방사성동위원소 심조영술상 심전도게이트 일회통과법을 이용한 우심실 박출계수

박용휘(Yong Whee Bahk),정수교(Soo Kyo Chung),신경섭(Kyung Sub Shinn),이성용(Sung Yong Lee),이해규(Hae Giu Lee),문영희(Young Hee Moon),박석민(Suk Min Park),임정익(Jeong Ik Yim),김영균(Young Gyun Kim),권순석(Soon Seog Kwon) 대한핵의학회 1993 핵의학 분자영상 Vol.27 No.1

N/A Radionuclide cardioangiography has been widily applied and has played mjor foles in moninvasive assessment of cardiac function. Three techinques, first-pass gated first and gated equlibrium nethods have commonly been used to evaluate right ventricular ejection fraction which usually abnormal in the patients with cardiopulmonary disease. It has been known that the gated first pass method is most accrate method among the three rechiques in assessment of fight ventricuiar ejection fraction. The radionuclide right ventricular ejection fraction values were determined in 13 normal subjects and in 15 patients with chronic obstructive puimonary disease by the gated first pass method and compared with those of the first pass method because there has been no published data of fight ejection fraction by the gated first pass method were compared with the detas from the pulmonary function test performed in the patients wih chronic obstructive pulmomar desease. The results were as follows; 1) The values of fight ventricular ejection fraction by the gated first pass method were 50.1 +- 6.1% in normal subjects and 38.5 +- 8.5 in the patients with chronic obstructive pulmonary disease. There was statistically significant difference between the right ventricular ejection fraction of each of the two groups (p<0.05) 2) The right ventricular ejection fraction by the gted first pass method was not linearly correlated ith FEV, VC. DLCO. and FVC as well as PO2 and PCO2 of the patients with chronic obstructive pulmonary disease. We concluded that right ventricular ejection fraction by the gated first pass method usingradionuclide cardioangiography may be suseful in clinical assessment of the right ventricular function.

기관지 천식의 연무흡입 폐환기스캔 소견

박용휘(Yong Whee Bahk),정수교(Soo Kyo Chung),박정미(Jeong Mi Park),신경섭(Kyung Sub Shinn),박영하(Young Ha Park),김범수(Bum Soo Kim),정명희(Myung Hee Chung) 대한핵의학회 1991 핵의학 분자영상 Vol.25 No.1

N/A Radioaerosol inhalation imaging (RII) has been used in radionuclide pulmonary studies for the past 20 years. The method is well accepted for assessing regional ventilation because of its usefulness, easy fabrication and sirnple application system. To evaluate its clinica1 utility in the study of irnpaired regional ventilation in bronchial asthma, we obtained and analysed RIIs in 31 patients (16 women and 15 men; age ranging 21-76 years) with typical bronchial asthma at the Department of Radiology, Kangnam St. Mary's Hospital, Catholic University Wledical colle#ge, from January, 1988 to August, 1989. Scintiscans were obtained with radioaerosol produced by a HARC(Bhabha Atomic Reserch Center, 1nc]ia) nebulizer with 15 mCi of Tc-phytate. The scanning was performed in anterior, posterior and lateral projections foIlowing 5-rninute inhalation of radioaerosol on sitting position. The scans were analyed and correlated with the results of pulmonary function study and the findings of chest radiography. Fifteen patients had concomitant lung perfusio#n image with ' Tc-MAA. Follow-up scans were obtained in 5 patients after bronchodilator therapy. 1 he patients were divided into (1) att.ack type (4 patients), (2) resistant type (5 patients), (3) remittent type (10 patients) and (4) bronchitic type (12 patients). Chest radiography showed hyperinflation, altered pulmonary vascularity, thickening of the bron- chial wall and accentuation of hasal interstiti.al markings in 26 of the 31 patients. Chest radiographs were normal in the remaining 5 patients. Regardless of type, the findings of RII were basically the same, and characterized by the deposition of radioaerosol in the central parts or in the main respiratory air ways along with mottled nonsegmental ventilation defects in the periphery. Peripheral parenchymal defects were more extensive than that of expected findings from clinical symptoms, pulmonary function test and chest radiograph. Rroomstick sign was present in 1.7 patients. The abnorrnality of RII was poorly correlated with perfusion scans. In all 5 patients treated with bronchodilators, follow-up study demonstrated a decrease in the degree of radioaerosol deposition in the central air way with improved ventilation defects. This study indicates that RII is a useful technique for the evaluation of regional ventilation abormality and the effect of treatrnent with bronchodilators in patients with bronchial asthma.

반사성 교감신경계 기능장애 증후군 ( RSDS ) 의 손 3상 골스캔 소견

박용휘(Yong Whee Bahk),정수교(Soo Kyo Chung),박정미(Jeong Mi Park),신경섭(Kyung Sub Shinn),김성훈(Sung Hoon Kim),박영하(Young Ha Park),안명임(Myeong Im Ahn) 대한핵의학회 1991 핵의학 분자영상 Vol.25 No.1

N/A Reflex sympathetir. dystrophy syndrome (RSDS), known also as Sudecks atrophy, is an uncomrnon disoder recognized by its distinctive symptom complex consisting of pain and tenderness, vasomotor instability, swelling, and dystrophic skin changes and radiologic changes. The present study has been carried out to prospectively establish scintigraphic diagnostic criteria for RSDS using three-phase radionuclide bone scintigraphy (TPBS). In addition, the csefulness in the evaluation of treatment of RSDS was assessed. Patients included were 6 men and 7 women with the age ranging from 25 to 63 years (average 47 years). Diagnosis was based on typical clinical symptoms and signs as described above. Associated r.linical conditions in these patients were cerebral infarction (4 patients), lung cancer (2 patients), trauma (1 patient), lymphoma (1 patient), and unknown cause (5 patients). All patients showed diffuse radionuclide accumulation in juxtaarticular region on the delayed static image and 11 patients showed diffusely increased activities also on scintiangiogram and blood-pool image. Fillow-up TPBS after corticosteroid therapy in 4 patients revealed near normal return of abnormal radionuclide accumulations in the affected hand. TPBS is an useful test for the diagnosrs of as well as the evaluation of the therapeutic effects of RSDS.

혈액 투석시 발생하는 저혈압에 대한 Amezinium Methylsulfate(Risumic)의 예방 효과에 대한 다기관 공동연구

김용수(Yong Soo Kim),방병기(Byung Kee Bang),김영옥(Young Ok Kim),송호철(Ho Chul Song),양철우(Chul Woo Yang),박정희(Jung Hee Park),박주현(Joo Hyun Park),김병수(Byung Soo Kim),박철휘(Cheol Whee Park),안석주(Suk Ju Ahn),최의진(Eui Jin C 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.1

N/A Background : Dialysis-induced hypotension is a very common but difficult complication to manage. Amezi-nium methylsulfate is a newly developed sympatho-mimetic agent which has been reported as effective in postural hypotension. We studied the preventive effect of amezinium methylsulfate on dialysis-induced hypo- tension in chronic hemodialysis patients. Methods: Twenty-five hemodialysis(HD) patients who were maintaining on hemodialysis longer than 3 months and had frequent episodes of dialysis hypoten-sion were enrolled in this study. After 4 weeks of observation period, patients received one tablet of ameziniurn 30 minutes prior to every hemodialysis session for 4 weeks. We com mean arterial pressure(MAP), number of hypotensive episodes and number of nursing interventions(defined as position change, bolus injection of saline or 50% dextrose in water, need to decrease transmembrane pressure or discon- tinuation of dialysis) between observation and medi-cation period in each patient. Results: The number of nursing interventions (mean, 2.5±0.9 interventions vs. 1.4±0.9 interventions, p<0.05) and hypotensive episodes(mean, 1.7±0.7 episodes per session vs. 0.9±0.7 episodes per session; p<0.05) decreased significantly in the medication period and the nadir MAP(57±13mmHg vs 70±15mmHg; p<0.05), mid-HD MAP(65±15mmHg vs. 79±15mmHg; p<0.05) and post-HD MAP(66±14mmHg vs 78±16 mmHg ; p<0.05) are higher in the medication period compared with observation period. Conclusion : These results show that amezinium methylsulfate is useful to prevent dialysis-induced hypotension in chronic hemodialysis patients.

Depiction of Nidi and Fibrovascular Zones of Osteoid Osteomas Using Gamma-Correction Tc-99m HDP Pinhole Bone Scan and Conventional Radiograph, and Correlation with CT, MRI, and PVC Phantom Imaging

Bahk, Yong-Whee,Kim, Sung-Hoon,Chung, Yong-An,Bahk, Won-Jong,Park, Jung-Mee,Kang, You-Mee,Choi, Woo-Hee,Park, Young-Ha,Sohn, Hyung-Sun,Kim, Byung-Ki,Chung, Soo-Kyo The Korea Society of Nuclear Medicine 2011 핵의학 분자영상 Vol.45 No.1

Purpose For the precise imaging diagnosis of osteoid osteoma (OO), the identification of the nidus and fibrovascular zone (FVZ) is essential. However, the latter sign has received little attention because it is difficult to demonstrate. We applied the recently introduced gamma correction (GC) to depict the FVZ on pinhole bone scan (PBS), conventional radiography (CR), and computed tomography (CT). Nongamma correction MRI was also analyzed for reference. Methods Ten patients with histologically proven diagnoses of OO were enrolled in this retrospective study. PBS, CR, and CTwere processed by GC to demonstrate the nidi and FVZ as distinct yet integrating components of OO. PBS was performed using a 4-mm pinhole collimator 3 h after iv injection of 925 to 1,110MBq (25 to 30mCi) of Tc-99mHDP, and anteroposterior and mediolateral CR and transverse CT were taken according to the standard technique. MRI sequences included T1- and T2-weighted images. For gamma correction, we utilized the Photo Correction Wizard program of ACD Photo Editor v3.1. A team of three qualified nuclear physician-radiologists, two nuclear physicians, and one MRI specialist read bone scans, radiographs, and MRIs of OO according to each specialty, and orthopaedic aspects and histology were reviewed by one qualified orthopedic surgeon and two qualified pathologists, respectively. Each observer first read the images separately with basic information about the aim of the study given and then in concert. Interpretive disagreement was settled by discussion and consensus. Results On pinhole scan, nidi were presented as areas of intense tracer uptake in all cases, and, importantly after GC, a thin ring-like zone with lower tracer uptake became visible in seven out of ten cases. GCCR also revealed a thin lucent zone that circumscribed the nidi in six out of ten cases and GCCT in two of four cases.MRI, without GC, presented nidi with high signal in the center and a thin ring-like zone with low signal in the periphery in five out of six cases. Ring-like zones were 1-2 mm in thickness and circumscribed the nidus as an integrated part and, hence, were morphologically interpreted as FVZ. Histologically, the presence of a variously mineralized FVZ was confirmed in four cases, but individual locusby- locus image-histology correlation could not be accompolished because specimens were fragmentary. In the FVZ, tracer uptake was lower than in nidi, presumably reflecting that bone metabolism in the two parts differs as in their histology. Statistically, no significant correlation existed between the duration of symptoms and imaging demonstrability of the FVZ (Spearman's test r=-0.057, p=0.877), but parallelism existed in the demonstrability of the FVZ among GC PBS, CR, and CT, and non-correction MRI. Conclusions GC was useful to enhance the resolution of PBS, CR, and CT in OO so that both the nidi and FVZ were separately imaged. The use of CG PBS and CR in combination is recommended for the specific diagnosis of OO with information about bone metabolism and anatomical characteristics. PBS and CR are economical and widely available.