• 제목/요약/키워드: Cardiovascular magnetic resonance imaging

검색결과 112건 처리시간 0.031초

비대성심근증 환자의 이완기능평가: 승모판과 폐정맥 유속을 측정한 위상차 MRI의 이용 (Diastolic Function in Patients with Hypertrophic Cardiomyopathy: Evaluation Using the Phase-contrast MRI Measurement of Mitral Valve and Pulmonary Vein Flow Velocities)

  • 김은영;최연현;김성목;이상철;장성아;오재건
    • Investigative Magnetic Resonance Imaging
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    • 제18권4호
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    • pp.314-322
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    • 2014
  • 배경: 심장의 이완기능 이상은 비대성심근증 환자에서 흔히 발견되는 문제이다. 본 연구는 비대성심근증 환자의 심장 이완기능을 평가하는 데 있어, 승모판과 폐정맥의 유속을 이용한 MRI의 역할을 알아보고자 하였다. 방법과 결과: 승모판과 폐정맥의 유속을 이용한 위상차 MRI와 심초음파검사가 59명 (남:여 = 44:15, 평균 연령 = 51세)의 비대성심근증 환자에서 시행되었다. 49명의 환자가 심초음파검사에서 다양한 정도의 심장 이완기능 이상을 보였다; grade 1 (20명), grade 2 (27명), and grade 3 (2명). MRI로 계산한 승모판 유속인자들 (E, A, E/A ratios)은 심초음파검사로 구한 동일 인자들과 양의 상관관계를 보였다 (Pearson's r values = 0.47, 0.60, 0.75 for E, A, E/A, respectively, all P < 0.001). MRI로 폐정맥 유속정보를 이용하는 경우, pseudo-normalized pattern (8명)이 정상 충만 양상(filling pattern) (17명)과 구분될 수 있었고, 이들을 이용하여 이완기능 정도를 평가를 하는 경우, 심장 MRI가 심초음파검사와 중등도의 일치도를 보였다 (kappa value = 0.45, P < 0.001). 결론: 비대성심근증 환자에서 위상차 MRI를 이용한 심장 이완기능 평가는 임상적으로 적용 가능한 방법이며, 폐정맥 유속 분석을 추가하는 경우, 정상과 pseudo-normal을 구분하는데 유용하다.

Are There Any Additional Benefits to Performing Positron Emission Tomography/Computed Tomography Scans and Brain Magnetic Resonance Imaging on Patients with Ground-Glass Nodules Prior to Surgery?

  • Song, Jae-Uk;Song, Junwhi;Lee, Kyung Jong;Kim, Hojoong;Kwon, O Jung;Choi, Joon Young;Kim, Jhingook;Han, Joungho;Um, Sang-Won
    • Tuberculosis and Respiratory Diseases
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    • 제80권4호
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    • pp.368-376
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    • 2017
  • Background: A ground-glass nodule (GGN) represents early-stage lung adenocarcinoma. However, there is still no consensus for preoperative staging of GGNs. Therefore, we evaluated the need for the routine use of positron emission tomography/computed tomography (PET)/computed tomography (CT) scans and brain magnetic resonance imaging (MRI) during staging. Methods: A retrospective analysis was undertaken in 72 patients with 74 GGNs of less than 3 cm in diameter, which were confirmed via surgery as malignancy, at the Samsung Medical Center between May 2010 and December 2011. Results: The median age of the patients was 59 years. The median GGN diameter was 18 mm. Pure and part-solid GGNs were identified in 35 (47.3%) and 39 (52.7%) cases, respectively. No mediastinal or distant metastasis was observed in these patients. In preoperative staging, all of the 74 GGNs were categorized as stage IA via chest CT scans. Additional PET/CT scans and brain MRIs classified 71 GGNs as stage IA, one as stage IIIA, and two as stage IV. However, surgery and additional diagnostic work-ups for abnormal findings from PET/CT scans classified 70 GGNs as stage IA, three as stage IB, and one as stage IIA. The chest CT scans did not differ from the combined modality of PET/CT scans and brain MRIs for the determination of the overall stage (94.6% vs. 90.5%; kappa value, 0.712). Conclusion: PET/CT scans in combination with brain MRIs have no additional benefit for the staging of patients with GGN lung adenocarcinoma before surgery.

Neurologic Outcomes of Preoperative Acute Silent Cerebral Infarction in Patients with Cardiac Surgery

  • Sim, Hyung Tae;Kim, Sung Ryong;Beom, Min Sun;Chang, Ji Wook;Kim, Na Rae;Jang, Mi Hee;Ryu, Sang Wan
    • Journal of Chest Surgery
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    • 제47권6호
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    • pp.510-516
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    • 2014
  • Background: Acute cerebral infarction is a major risk factor for postoperative neurologic complications in cardiac surgery. However, the outcomes associated with acute silent cerebral infarction (ASCI) have not been not well established. Few studies have reported the postoperative outcomes of these patients in light of preoperative Diffusion-weighted magnetic resonance imaging (DWI). We studied the postoperative neurologic outcomes of patients with preoperative ASCI detected by DWI. Methods: We retrospectively studied 32 patients with preoperative ASCI detected by DWI. None of the patients had preoperative neurologic symptoms. The mean age at operation was $68.8{\pm}9.5$ years. Five patients had previous histories of stroke. Four patients had been diagnosed with infective endocarditis. Single cerebral infarct lesions were detected in 16 patients, double lesions in 13, and multiple lesions (>5) in three. The median size of the infarct lesions was 4 mm (range, 2 to 25 mm). The operations of three of the 32 patients were delayed pending follow-up DWI studies. Results: There were two in-hospital mortalities. Neurologic complications also occurred in two patients. One patient developed extensive cerebral infarction unrelated to preoperative infarct lesions. One patient showed sustained delirium over one week but recovered completely without any neurologic deficits. In two patients, postoperative DWI confirmed that no significant changes had occurred in the lesions. Conclusion: Patients with preoperative ASCI showed excellent postoperative neurologic outcomes. Preoperative ASCI was not a risk factor for postoperative neurologic deterioration.

외과적 심실 복원과 승모판 고리성형 후 좌심실 형태와 기능의 초기 변화: 자기공명영상 (Early Changes of Left Ventricular Geometry and Function after Surgical Ventricular Restoration and Mitral Valve Annuloplasty: Magnetic Resonance Imaging)

  • 최병욱;장병철;김영진;허진;이혜정;김태훈;최규옥
    • Investigative Magnetic Resonance Imaging
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    • 제12권1호
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    • pp.40-48
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    • 2008
  • 목적: 개정 도씨 술식과 승모판 고리성형을 동시에 시행한 후 심실의 형태와 기능의 초기 변화를 자기공명영상을 이용하여 평가하고자 하였다. 대상 및 방법: 총 21명의 확장성 심부전 환자를 대상으로 하여 8명에서 개정 도씨 술식을, 6명에서 승모판 고리성형을, 7명에서 두 수술을 동시에 시행하였다. 영화 자기공명영상을 이용하여 수술 전과 후에 좌심실의 형태와 기능을 평가하였다. 좌심실의 이완기말 용적과 수축기말 용적, 장축과 단축의 길이를 측정하고 이로부터 좌심실의 일회박출량, 박출률, 구형지수를 계산하여 구하였다. 이렇게 구해진 인자들을 분석하고 술식이 서로 다른 3군에서 어떻게 다른지 비교하고 두 수술을 동시에 시행할 때의 효과를 해석하였다. 결과: 자기공명영상은 수술 전 $12\;{\pm}\;15$ 일 (범위 1-58 일)과 수술 후 $38\;{\pm}\;50$ 일 (범위 7- 231 일)에 시행하였다. 두 수술을 동시에 시행한 군에서 다른 군에 비하여 수술 전 좌심실의 확장이 더 심하였고 수축력이 더 감소되어 있었다. 수술 후, 좌심실의 이완기말 용적과 수축기말 용적은 수술 형태와 관계없이 모든 환자에서 유의하게 감소하였다. 박출률은 개정 도씨 술식을 받은 환자 군에서만 유의하게 증가하였다 (25.4% to 40.7%). 구형지수는 개정 도씨 술식을 받은 환자에서는 증가하였고 승모판 고리성형을 받은 환자에서는 감소하였다 (0.65 to 0.78 vs. 0.75 to 0.65). 두 수술을 동시에 시행한 환자에서는 유의한 구형지수의 변화가 없었다. 결론: 개정 도씨 술식과 승모판 고리성형을 동시에 시행받은 확장성 심부전 환자에서 좌심실의 형태와 기능의 초기 변화는 좌심실 용적과 일회박출량의 현저한 저하이다. 승모판 고리성형에 의한 구형지수의 감소는 개정 도씨술식에 의한 구형지수의 증가에 의해 상쇄되어 좌심실의 형태는 변하지 않는다. 두 수술을 동시에 시행한 후 좌심실 박출률의 향상은 조기에 일어나지 않는다.

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Fontan 수술 후 전폐절제술 -1례 보고- (Pneumonectomy after Fontan Operation -A Case Report-)

  • 김현조;성숙환;김용진
    • Journal of Chest Surgery
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    • 제28권8호
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    • pp.784-787
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    • 1995
  • A 3-year old female who underwent modified Fontan operation for the double outlet right ventricle with hypoplastic left ventricle at the age of 15 month was admitted with hemoptysis, which was developed 4 days prior to visit. Cardiac catheterization revealed that multiple collaterals from descending thoracic aorta supplied the right lung and drained to the right pulmonary artery. Chest magnetic resonance imaging [MRI showed that the right lung was consolidated by the secondary long-term pulmonary congestion. We decided to perform pneumonectomy because the consolidated right lung and the back-flow from the right pulmonary aretry would worsen the present hemodynamic state of patient. Post-operative course was uneventful, and she could be discharged with good general conditions.

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Isthmic Spondylolisthesis Associated with Foraminal Disc Herniation Treated by Anterior Lumbar Interbody Fusion

  • Lee, Dong-Yeob;Lee, Sang-Ho;Maeng, Dae-Hyeon;Jang, Jee-Soo
    • Journal of Korean Neurosurgical Society
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    • 제38권4호
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    • pp.320-322
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    • 2005
  • A 45-year-old man presented with lower back pain and pain in the right leg of 3years duration. A plain radiographic examination revealed grade I isthmic spondylolisthesis, with instability at L4-5. Computed tomography and magnetic resonance imaging demonstrated bilateral foraminal stenosis, with soft foraminal disc herniation on the right side at the L4-5 level. He underwent anterior lumbar interbody fusion[ALIF] with percutaneous posterior fixation[PF] at the L4-5 level. Without removing the posterior bony structures, removal of foraminal disc herniation and reduction of spondylolisthesis were successfully performed using ALIF with percutaneous PF. When there is no hard disc herniation or lateral recess stenosis, ALIF with percutaneous PF can be one of the treatment options for isthmic spondylolisthesis, even in the presence of foraminal disc herniation, as in our case.

침의 통증 조절에 관한 최근 연구 동향 (The Recent Study on Pain Modulation of Acupuncture)

  • 김종윤;고형균;남상수
    • Journal of Acupuncture Research
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    • 제23권1호
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    • pp.145-154
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    • 2006
  • Objectives : To research the recent trends of study related to pain modulation of acupuncture. Methods : We searched the resent study related to pain modulation of acupuncture. Results & Conclusion : 1) Early studies demonstrated that the analgesic effects of acupuncture are mediated by opioid peptides in the periaqueductal gray. Recent evidences show that nitric oxide plays an important role in mediating the cardiovascular responses to acupuncture stimulation through gracile nucleus-thalamic pathway. 2) Recent evidences show that acupuncture stimulate gene expression related to pain. 3) By using functional magnetic resonance and positron emission tomography, recent study suggest that acupuncture has regionally specific, quantifiable effects on pain-relevant brain structures.

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상완신경총에서 발생한 신경원성 종양 - 1예 보고 - (Neurogenic Tumor of the Brachial Plexus -A case report -)

  • 김덕실
    • Journal of Chest Surgery
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    • 제37권1호
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    • pp.84-87
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    • 2004
  • 상완신경총에 생기는 신경원성 종양은 드문 질환이다. 최근에 저자는 상완신경총에 발생한 한 예의 신경초종을 치험하였다. 환자는 34세 남자로 좌측 쇄골상부에 서서히 자라는 종괴를 주소로 내원하였다. 자기공명영상에서 좌측 쇄골하동맥의 후상방부에 고립성 종괴를 발견하였다. 수술 시 상완신경총 직하부에 피막으로 잘 감싸진 종괴를 발견하였으며, 신경 섬유를 가능한한 다치지 않게 하기 위해 피막을 열고 종양을 적출하였다. 수술 후 신경학적인 결함은 없었다.

흉벽의 임파관종 (Lymphangioma of the Chest Wall)

  • 김영진;이철주;소동문;김정태;강준규;홍준화
    • Journal of Chest Surgery
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    • 제32권9호
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    • pp.855-857
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    • 1999
  • 흉벽의 임파관종은 전 세계적으로 매우 드물게 보고 되어있다. 본원에서는 16세의 여자환자로 우측 상부 후측방 흉벽에 반복적으로 나타나는 거대 종괴를 주소로 내원한 임파관종 환자를 치험하였다. 진단은 이학 적 검사와 흉부 핵자기공명 촬영, 동위원소 임파관 촬영술을 실시하였으며 조직검사로 확진하였다. 치료는 외과적 완전 절제를 하였으며 술후 반복적 림프액의 유출로 수술부위에 vibramycin을 주사하였다.

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Delayed Surgery for Aortic Dissection after Intravenous Thrombolysis in Acute Ischemic Stroke

  • Choi, Nari;Yoon, Jee-Eun;Park, Byoung-Won;Chang, Won-Ho;Kim, Hyun-Jo;Lee, Kyung Bok
    • Journal of Chest Surgery
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    • 제49권5호
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    • pp.392-396
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    • 2016
  • We report a case of aortic dissection masquerading as acute ischemic stroke followed by intravenous thrombolysis. A 59-year-old man presented with dizziness. After examination, the patient had a seizure with bilateral Babinski signs. Soon after identifying multiple acute infarctions in both hemispheres on diffusion-weighted brain magnetic resonance (MR) imaging, tissue plasminogen activator (t-PA) was administered. Both common carotid arteries were invisible on MR angiography, and subsequent chest computed tomography revealed an aortic dissection. The emergency operation was delayed for 13 hours due to t-PA administration. The patient died of massive bleeding.