핫이슈 : 웹 개발방법론의 변화, OPEN API와 매쉬업

박지강 한국지역정보개발원 (구 자치정보화조합) 2007 지역정보화 Vol.45 No.-

Leak Sign on Dynamic-Susceptibility- Contrast Magnetic Resonance Imaging in Acute Intracerebral Hemorrhage

박지강,Dae Young Hong,Sun Tak Jin,Dong-Woo Lee,Hae Wook Pyun 대한자기공명의과학회 2020 Investigative Magnetic Resonance Imaging Vol.24 No.3

Purpose: A CT angiography spot sign (CTA-spot) is a significant predictor of the early expansion of an intracerebral hemorrhage (ICH-Ex). Dynamic-susceptibility-contrast magnetic resonance imaging (DSC-MRI) can track the real-time leaking of contrast agents. It may be able to indicate active bleeding, like a CTA-spot. Materials and Methods: From September 2014 to February 2017, we did noncontrast CT, CTA, and DSC-MRI examinations of seven patients with acute ICH. We investigated the time from symptom onset to the first contrast-enhanced imaging. We evaluated the time course of the contrast leak within the ICH at the source image of the DSC-MRI and the volume change of ICH between non-contrast CT and DSCMRI. We compared the number of slices showing CTA-spots and DSC-MRI leaks. Results: The CTA-spot and DSC-MRI leak-sign were present in four patients, and two patients among those showed ICH-Ex. The time from the symptom onset to CTA or DSC-MRI was shorter for those with a DSC-MRI leak or CTA-spot than for three patients without either (70-130 minutes vs. 135-270 minutes). The leak-sign began earlier, lasted longer, and spread to more slices in the patients with ICH-Ex than in those without ICH-Ex. The number of slices of the DSC-MRI leak and the number of the CTA-spot were well correlated. Conclusion: DSC-MRI can demonstrate the leakage of GBCA within hyperacute ICH, showing the good contrast between hematoma and contrast. The DSC-MRI leakage sign could be related to the hematoma expansion in patients with ICH.

Refractory pneumonia in a patient with coronavirus infection: a case report

박지강,손지영,서재덕,김재종,이태호,시혜진,고의원,남태현,강성윤 대한내과학회 2021 대한내과학회 추계학술대회 Vol.2021 No.1

전방 정복술 및 경피적 후방 압박나사 내고정술을 이용한 전위성 거골 경부 골절의 치료 결과

박지강,김용민,최의성,손현철,조병기,차정권,Park, Ji-Kang,Kim, Yong-Min,Choi, Eui-Sung,Shon, Hyun-Chul,Cho, Byung-Ki,Cha, Jung-Kwan 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.2

Purpose: Posteroanterior screw fixation is biomechanically stronger than anteroposterior screw fixation. However, there are few literature about the correlation between clinical results and more strength by posteroanterior fixation. This study was performed to evaluate the clinical outcomes of the accelerated rehabilitation following anterior open reduction and posterior percutaneous screw fixation for displaced talar neck fractures. Materials and Methods: Eighteen cases were followed up for more than 1 year after posteroanterior fixation using headless compression screw for talar neck fractures. The clinical evaluation was performed according to American Orthopaedic Foot and Ankle Society (AOFAS) score and Hawkins criteria. As radiographic evaluation, the degree of fracture displacement, period to union, and occurrence rate of complications such as avascular necrosis through MRI were measured. Results: The AOFAS score was average 90.4 points at the last follow-up. There were 7 excellent, 9 good, and 2 fair results according to the Hawkins criteria. Therefore, 16 cases(88.8%) achieved satisfactory results. The degree of fracture displacement had improved significantly from preoperative average 5.6 mm to 1.2 mm immediate postoperatively, and maintained to 1.1mm at the last follow-up. All cases achieved bone union, and the period to union was average 12.4 weeks. There were 3 cases of avascular necrosis of talar body and 2 cases of post-traumatic arthritis. Conclusion: Anterior open reduction and posterior percutaneous headless screw fixation seems to be an effective surgical method for displaced talar neck fractures, because of the possibility of accurate restoration of articular surface, fixation strength enough to early rehabilitation, and needlessness of hardware removal.

무지 외반증과 동반된 소족지 기형에 대한 수술적 교정치료가 임상 결과에 미치는 영향

박지강,김용민,김동수,박경진,조병기,정호승,Park, Ji-Kang,Kim, Yong-Min,Kim, Dong-Soo,Park, Kyoung-Jin,Cho, Byung-Ki,Jeong, Ho-Seung 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.3

Purpose: This study was performed to evaluate the impact of the lesser toe operation on the overall clinical outcomes, and to analyze the clinical results of concomitant surgery for hallux valgus and lesser toe deformities. Materials and Methods: Forty-six cases underwent surgery for hallux valgus with concomitant lesser toe deformities were followed up for at least 1 year. Lesser toe deformities consisted of 9 crossover toes, 10 claw toes, 12 hammer toes and 15 bunionettes. Clinical evaluation was performed according to AOFAS (American Orthopaedic Foot and Ankle Society) score, patient's satisfaction score, and pain VAS (visual analogue scale) score. Hallux valgus angle (HVA), intermetatarsal angle (IMA), and period to union were measured. Preoperative expectation about lesser toe deformities, postoperative satisfaction, complication rate, hospitalization period, medical expenses, and frequency of outpatient follow-up were analyzed. Results: AOFAS score, VAS score, HAV and IMA had improved significantly. On preoperative expectation of patients, correction of lesser toe deformities was ranked third, following the improvement of big toe(bunion) pain and the correction of hallux valgus. Patient's satisfaction score was average 92.8 points, and the importance of lesser toe operation was 30.2%. When compared to hallux valgus operation only, there were average 2.5 days of additional hospitalization, 2.4 times of additional outpatient follow-up, 386000 won of additional medical expenses. Conclusion: Combined operation for hallux valgus and concomitant lesser toe deformities showed good clinical results. When compared to hallux valgus operation only, there were longer hospitalization, more frequent follow-up, more medical expenses, more complications. However, lesser toe deformity correction in patients underwent hallux valgus operation is considerable, because of high preoperative expectation and postoperative satisfaction.

정규화 코드북을 이용한 분할 벡터 구조의 ISF 적응적 양자화 기법

박지강,임종하,홍기봉,이인성,Piao, Zhigang,Lim, Jong-Ha,Hong, Gi-Bong,Lee, In-Sung 한국음향학회 2011 韓國音響學會誌 Vol.30 No.5

본 논문에서는 ISF 계수의 순서화 성질을 이용하여 광대역 음성부화기의 분할구조 벡터양자화기의 단점을 보완함으로써 ISF 계수 양자화의 성능을 개선하는 알고리즘을 제안한다. 음성 부호화기의 ISF 벡터양자화기는 계산량과 메모리 수요량을 줄이기 위하여 벡터분할 구조를 사용한다. 이러한 벡터 분할구조의 양자화기는 분할된 벡터 사이의 상관도를 이용하지 못하였다. 제안하는 알고리즘은 ISF 계수의 순서화 특징을 이용하여 정규화 코드북을 만든다. 그리고 양자화 된 분할 벡터로 정규화 코드북의 분포범위를 적응적으로 변화시킴으로써 양자화 하여야 할 분할 벡터의 코드북을 효율적으로 만들어 준다. 제안된 알고리즘은 분할 벡터사이의 저하된 상관도를 순서화 특징을 통하여 다시 이용하는 방법으로 표준화 코덱인 AMR-WB의 ISF 양자화기에 적용하여 1.5 bit정도의 성능 개선을 얻었다. In most of the ISF (or LSF) based real time speech codec, SVQ (split vector quantization) method is used to decrease the quantizer complexity and memory size of codebook. However, it produces drawback that the level of correlation between code vectors can not be used during vector splits. This paper presents a new method of adaptive ISF vector quantization, which compensates the drawbacks of SVQ structured quantizer for wideband speech codec. In each different frame, the proposed method makes use of the correlation between splitted vectors by adaptively changing codebook distribution according to ordering property of ISF. The algorithm is evaluated in AMR-WB, and shows about 1.5 bit per frame improvement.

Hyperperfusion in DWI Abnormality in a Patient with Acute Symptomatic Hypoglycemic Encephalopathy

박지강 대한자기공명의과학회 2017 Investigative Magnetic Resonance Imaging Vol.21 No.2

The perfusion change in acute symptomatic hypoglycemic encephalopathy (ASHE) is not well known. We present the perfusion-weighted imaging of a patient with ASHE. The area of diffusion-weighted imaging abnormalities and adjacent normal-appearing white matter showed increased cerebral blood volume and flow, and shortening of time-to-peak.

분산 실시간 객체 TMO를 위한 MicroC/OS-Ⅱ 실시간 스케줄러의 설계 및 구현

박지강,서한석,김정국 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.1

회전근 개 파열에 대한 관절경적 봉합술과 소 절개 봉합술의 비교

박지강,박경진,김용민,김동수,최의성,손현철,조병기,임세혁,Park, Ji-Kang,Park, Kyoung-Jin,Kim, Yong-Min,Kim, Dong-Soo,Choi, Eui-Sung,Shon, Hyun-Chul,Cho, Byung-Ki,Im, Se-Hyuk 대한정형외과스포츠의학회 2010 대한정형외과스포츠의학회지 Vol.9 No.1

목적: 관절경적 회전근 개 봉합술과 소 절개를 이용한 봉합술의 결과를 비교 분석하고자 한다. 대상 및 방법: 회전근 개 파열이 확인된 44명의 환자를 대상으로 하였다. 23예에서는 관절경적 봉합술을, 21예에서는 소 절개를 이용한 봉합술을 시행하였다. 수술 시 평균연령은 관절경적 봉합술군이 50.4세, 소 절개를 이용한 봉합술군이 56.7세였다. 평균 추시 기간은 관절경적 봉합술군이 24.1개월, 소 절개를 이용한 봉합술군이 26.1개월이었다. 양 군의 결과를 견관절 운동범위, VAS (Visual Analogue Scale), ASES (American Shoulder and Elbow Society), UCLA (University of California LA) 점수를 비교했으며 이를 통계적으로 검정하였다. 결과: 파열의 크기는 관절경적 봉합술군에서 소파열이 2예, 중파열이 10예, 대파열이 11예였으며, 소 절개를 이용한 봉합술군에서는 각각 1예, 8예, 12예 였다. 평균파열의 크기는 관절경적 봉합술군은 3.8 cm이었고, 소 절개 봉합술군이 4.2 cm이었다. 최종 추시 시에 양 군에서 동통과 기능점수가 향상되었으나 양 군간의 차이는 없었다. 양 군의 견관절 운동범위 (p=0.7493), VAS (p=0.9677), ASES (p=0.8032), UCLA (p=0.2289) 점수의 통계적 차이는 없었다. 결론: 관절경적 회전근 개 봉합술군은 파열의 크기가 최종 추시 시 임상 결과와 유의한 상관 관계를 보이지 않았으나, 소절개 봉합술군은 파열의 크기가 클수록 결과가 좋지 않았다. 회전근 개 전층파열에서 관절경적 봉합술군과 소 절개를 이용한 봉합술군 간에 임상 결과의 차이는 보이지 않았다. Purpose: To compare the outcome of patients who underwent rotator cuff repair using all-arthroscopic mini-open repair techniques. Materials and Methods: We retrospectively reviewed 44 patients who underwent either arthroscopic (group I) or mini-open (group II) rotator cuff repair. 23 patients underwent an arthroscopic repair and 21 patients had a mini-open repair. The mean age was 50.4 years in the arthroscopic group and 56.7 years in the mini-open group. The outcomes for the 2 groups were evaluated using ROM, VAS, ASES, UCLA scale. Statistical analysis was performed using correlations, T-test, Paired T-test. The mean follow-up period in the arthroscopic and mini-open groups were 24.1months and 26.1months, respectively. Results: The group I (arthroscopic group) had 2 small-sized tears, 10 medium sized tears, and 11 large sized tears (3~5 cm). The group II (mini-open group) had 1 small sized tears, 8 medium sized tears, and 12 large sized tears. The mean cuff tear size of the group I and Group II were 3.8 cm and 4.2 cm, respectively. At last follow-up periods, ROM and functional scores were improved. In the group I and group II, there were no significant difference in ROM, VAS, ASES, UCLA score. Conclusion: The size of the tear did not produce different results at arthroscopic repair group but larger tear size was associated with a worse outcome in mini-open group. There were no significant clinical results between the arthroscopic and mini-open group.

운동선수의 만성 발목관절 불안정성에서 교량형 봉합술을 이용한 변형 Brostrom 술식 후의 기능평가

박지강,박경진,조병기,임채욱,Park, Ji-Kang,Park, Kyoung-Jin,Cho, Byung-Ki,Im, Chae-Wook 대한족부족관절학회 2014 대한족부족관절학회지 Vol.18 No.3

Purpose: Ligament reattachment technique using a suture anchor appears to show satisfactory functional outcomes and mechanical stability compared with conventional bone tunnel technique. This study was prospectively conducted in order to evaluate functional outcomes of modified Brostrom procedures using the suture bridge technique for chronic ankle instability in athletes. Materials and Methods: Twenty eight athletes under 30 years of age were followed for more than two years after undergoing the modified Brostrom procedure using the suture bridge technique. Functional evaluation consisted of the foot and ankle outcome score (FAOS), foot and ankle ability measure (FAAM) score. Range of motion and time to return to exercise were evaluated using a periodic questionnaire. Talar tilt angle and anterior talar translation were measured through stress radiographs for evaluation of mechanical stability. Results: FAOS improved significantly from preoperative mean 59.4 points to 91.4 points (p<0.001). Daily living and sport activity scores of FAAM improved significantly from preoperative mean 50.5, 32.5 points to 94.8, 87.3 points, respectively (p<0.001). Talar tilt angle and anterior talar translation improved significantly from preoperative mean $16.8^{\circ}$, 13.5 mm to $4.2^{\circ}$, 4.1 mm at final follow-up (p<0.001). Times to return to exercise were as follows: mean 10.2 weeks in jogging, 15.4 weeks in spurt running, 13.1 weeks in jumping, 11.5 weeks in walking on uneven ground, 9.1 weeks in standing on one leg, 7.2 weeks in tip-toeing gait, 8.4 weeks in squatting, and 10.6 weeks in descending stairs. Conclusion: Modified Brostrom procedure using the suture bridge technique showed satisfactory functional outcomes for chronic ankle instability in athletes. Optimal indication and cost-effectiveness of the suture bridge technique will be studied in the future.