• 제목/요약/키워드: Brain Vessel

검색결과 123건 처리시간 0.033초

뇌종양의 등급분류를 위한 관류 자기공명영상을 이용한 투과성영상(Permeability Map)의 유용성 평가 (Usefulness of Permeability Map by Perfusion MRI of Brain Tumor the Grade Assessment)

  • 배성진;이영주;장혁원
    • 대한방사선기술학회지:방사선기술과학
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    • 제32권3호
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    • pp.325-334
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    • 2009
  • 목 적 : 관류 자기공명영상(perfusion MRI)을 이용하여 대뇌(cerebral)에서 혈액뇌장벽의 파괴로 인하여 조영제가 혈관내에서 조직으로 빠져 나가는 투과성과 상대적 뇌혈류량을 영상화 해보고, 이 영상을 이용하여 구한 투과성비와 상대적 뇌혈류량비가 종양의 악성등급 평가와 감별진단에 어떠한 유용성이 있는지 알아보고자 하였다. 대상 및 방법 : 영상의학진단과 병리조직검사로 진단된 29명을 대상으로 뇌종양이 포함된 550(11 silce $\times$ 50 image)관류 자기공명영상을 3T기기에 장착된 프로그램으로 상대적 뇌혈류량을 영상화 하였고, 다른 한 방법은 개인 컴퓨터에 영상을 전송 후 IDL 6.2 프로그램을 이용하여 상대적 뇌혈류량(relative cerebral blood volume-reformulated singular value decomposition, rCBV-rSVD)과 투과성을 영상화 하였다. 그 영상을 이용하여 동일한 관심영역으로 화소별 평균 신호강도를 정량적(quantitative analysis)으로 측정하여 비모수적 통계인 Kruskal-wallis test를 통해 뇌종양별로 평균비교 분석을 하였다. 결과 : 상대적 뇌혈류량영상과 투과성영상을 이용하여 동일한 관심영역으로 정상부위와 종양부위의 정량적으로 분석한 상대적 뇌혈류량 비 와 (3T 기기자체 분석한 값, IDL 6.2로 분석한 값) 투과성비에서 고등급 성상세포종(n=4)의 경우 (14.75, 19.25) 13.13, 저등급 성상세포종(n=5) (14.80, 15.90) 11.60, 아세포종(n=5) (10.90, 18.60) 22.00, 전이성 뇌종양(n=6) (11.00, 15.08) 22.33, 수막종(n=6) (18.58, 7.67) 5.58, 핍돌기 신경교종(n=3) (23.33, 16.33) 15.67로 나타났다. 결론 : 종양별로 상대적 혈류량영상을 이용하여 측정한 상대적 뇌혈류량 비는 등급을 분류하기에 용이하지 않았지만, 투과성영상으로 측정한 투과성비는 종양 악성정도가 높을수록 높은 것으로 나타나 종양의 등급 평가와 감별진단에 유용하였다.

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Cardiac Ankyrin Repeat Protein의 과량발현이 혈관내피세포에서 갖는 혈관신생 촉진 효과 (Angiogenic Effect of Cardiac Ankyrin Repeat Protein Overexpression in Vascular Endo-thelial Cell)

  • 공훈영;변종회
    • 미생물학회지
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    • 제44권4호
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    • pp.282-288
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    • 2008
  • 혈관이 좁아지거나 막혀서 생기는 허혈은 심장, 뇌, 다리와 같은 인체의 여러 장기에 영향을 미친다. 최근 혈관신생 분야에서 많은 진전이 있어 기존 치료법으로 치료가 되지 않는 허혈성 환자들의 치료 가능성에 대한 기대가 많아졌다. 혈관형성은 여러 개의 인자들과 세포들이 관여하는 복잡한 과정이기 때문에, 한 개의 인자보다는 여러 인자들을 병합하는 요법이 점점 많이 시도되고 있는데, 이런 병합요법의 한 예로 전사인자를 전달하는 전략을 생각할 수 있다. 이에 본 연구에서는 cardiac ankyrin repeat protein (CARP)의 유전자를 대상으로 그 혈관신생 능력을 혈관내피세포에서 조사하였다. 아데노바이러스 벡터 내에 human CARP의 cDNA를 클로닝하여 재조합 아데노바이러스를 제조하였으며, 이를 이용한 유전자 전달실험 결과, CARP 유전자 전달 군에서 유의하게 혈관내피세포의 중식과 모세관 구조 형성, 그리고 vascular endothelial growth factor의 발현 등을 증가시킴을 확인하였다. 본 연구 결과는 CARP가 혈관신생 연구의 새로운 목표 유전자로서 그 기능에 대한 많은 연구가 필요함을 뒷받침해준다.

White Matter Lesions Predominantly Located in Deep White Matter Represent Embolic Etiology Rather Than Small Vessel Disease

  • Young Hee Jung;Seongbeom Park;Na Kyung Lee;Hyun Jeong Han;Hyemin Jang;Hee Jin Kim;Sang Won Seo;Duk Lyul Na
    • 대한치매학회지
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    • 제22권1호
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    • pp.28-42
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    • 2023
  • Background and Purpose: We investigated the correlation between the deep distribution of white matter hyperintensity (WMH) (dWMH: WMH in deep and corticomedullary areas, with minimal periventricular WMH) and a positive agitated saline contrast echocardiography result. Methods: We retrospectively recruited participants with comprehensive dementia evaluations, an agitated saline study, and brain imaging. The participants were classified into two groups according to WMH-distributions: dWMH and dpWMH (mainly periventricular WMH with or without deep WMH.) We hypothesized that dWMH is more likely associated with embolism, whereas dpWMH is associated with small-vessel diseases. We compared the clinical characteristics, WMH-distributions, and positive rate of agitated saline studies between the two groups. Results: Among 90 participants, 27 and 12 met the dWMH and dpWMH criteria, respectively. The dWMH-group was younger (62.2±7.5 vs. 78.9±7.3, p<0.001) and had a lower prevalence of hypertension (29.6% vs. 75%, p=0.008), diabetes mellitus (3.7% vs. 25%, p=0.043), and hyperlipidemia (33.3% vs. 83.3%, p=0.043) than the dpWMH-group. Regarding deep white matter lesions, the number of small lesions (<3 mm) was higher in the dWMH-group(10.9±9.7) than in the dpWMH-group (3.1±6.4) (p=0.008), and WMH was predominantly distributed in the border-zones and corticomedullary areas. Most importantly, the positive agitated saline study rate was higher in the dWMH-group than in the dpWMH-group (81.5% vs. 33.3%, p=0.003). Conclusions: The dWMH-group with younger participants had fewer cardiovascular risk factors, showed more border-zone-distributions, and had a higher agitated saline test positivity rate than the dpWMH-group, indicating that corticomedullary or deep WMH-distribution with minimal periventricular WMH suggests embolic etiologies.

우상지(右上肢) 단마비(單痲痺)가 주증(主症)인 풍비 환자의 만금탕가미방(萬金湯加味方) 투여 호전 1례 (Case Report of Hemiplegia after apoplexy in a Patient with Monoplegia on Right upper Extremity Treated with Herbal Prescription)

  • 정병주;우성호;김병철;김용호;서호석;황규동;장하정;남효익;김회영;김진원
    • 대한한방내과학회지
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    • 제27권1호
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    • pp.288-293
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    • 2006
  • Background : Monoplegia is the paralysis of a limb. It is commonly caused by an injury to the cerebral cortex, and rarely caused by injury to the internal capsule, brain stem, or spinal cord. Most problems with cerebral cortex is derived from the occlusion of a brain cortex blood vessel due to thrombus or embolus. Objectives : This study is to see if there is a significance in thermal differences of acupoints in diagnosis and treatment of monoplegia on an upper extremity to test the validity of acupuncture and herbal treatment for it. Methods : By using Digital Infrared Thermographic Imaging(DITI), thermal differences$({\Delta}T)$ of acupoints on the upper extremity in a patient with monoplegia on the right upper extremity were measured after an attack of the disease. By giving Mangeum-tang(萬金湯) and treating the patient with acupuncture. the temperature changes of the upper extremity were examined through DITI and improvement was observed. Results : Compared with the left arm which suffered no such injury, the right recovered about 80% of sensation, and the grade of monoplegia improved from Grade O to Grade V. Also, the temperatures of right palmar-dorsal hand and the region of Weiguan(外關, Waiguan, TE5) were $1^{\circ}C$ and $1.45^{\circ}C$ higher than the same left region on admission day, but the thermal differences$({\Delta}T)$ narrowed to $0.5^{\circ}C$ by the last day. Conclusions : Results suggest that DITI screening is a reliable method of prognosis and that the time required for treatment can be estimated through this method in cases of monoplegia to an upper extremity. Also, progress in treatment is reflected in thermal differences of acupoints of the monoplegic upper extremity in accordance with the theory of meridian. This supports a role for acupuncture and herbal treatment for monoplegia.

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Brain Angiography 검사 시 Scan Time에 따른 Contrast Media Volume에 대한 연구 (Study on the Contrast Media Volume according to Scan Time during Brain Angiography Examination)

  • 이주련;김동현
    • 한국방사선학회논문지
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    • 제15권1호
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    • pp.29-35
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    • 2021
  • 본 연구의 목적은 주기적으로 follow up CT를 촬영하는 뇌출혈 환자에게 조영제의 양을 줄임으로써 줄이기 전과 후의 영상의 화질의 차이가 있는지에 관하여 조사하는 것이었고, 줄이기 전과 후의 영상을 검사한 후 MMWP 프로그램을 이용하여 각각의 혈관 위치에 ROI를 설정하여 화질을 평가하였다. 먼저 Rt. CCA, Lt.CCA. Rt.MCA, Lt.MCA, Basilar artery에 각각 ROI를 잡았다. 둘째, 잡은 ROI에 대한 평균값과 표준편차값을 구하였다. 셋째, 구해진 평균값과 표준편차 값을 통하여 SNR과 CNR을 구하였다. 구하여진 SNR값과 CNR값을 T-test 통계를 구한 결과 SNR에 대한 결과 값은 Rt.CCA 0.765, Lt.CCA 0.871, Rt.MCA 0.343, Lt.MCA 0.235, Basilar artery 0.916이며, CNR에 대한 결과 값은 Rt.CCA 0.088, Lt.CCA 0.069, Rt.MCA 0.818, Lt.. MCA 0.579, Basilar artery 0.878로 나타났다. 구해진 SNR값과 CNR값을 통하여 통계를 구한 결과값이 조영제를 줄이기 전과 후의 영상의 화질에 차이가 없는 것으로 나타났다. 따라서 본 연구가 주기적으로 CT검사를 하는 환자들에게 조영제에 대한 부담이 덜어질 수 있는 지표가 되기를 바랍니다.

편측성 안면경련 환자의 미세혈관 감압수술에서 효과적인 수술 중 신경계 감시검사를 위한 제안 (Suggestions for the Effective Intraoperative Neurophysiological Monitoring in Microvascular Decompression Surgery of Hemifacial Spasm)

  • 임성혁
    • 대한임상검사과학회지
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    • 제48권3호
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    • pp.262-268
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    • 2016
  • 편측성 안면경련(hemifacial spasm)은 불수의적으로 안면의 근육에서 발작적인 경련이 일측성으로 반복해서 발생하는 질환이다. 한 근육의 수축으로 인해 동시적으로 여러 근육이 동시에 수축되는 동시 수축성(synkinesia)이 특징이다. 발병원인은 제 7뇌신경인 안면신경이 혈관에 의해 압박을 받아서 나타나게 된다. 본 연구는 편측성 안면경련 환자의 미세혈관 감압 수술을 받은 환자를 대상으로 수술 중 진행되는 신경계 감시검사 방법들에 대해 다루었다. 청각유발전위 검사에서는 수술용 뇌 견인기의 사용시 주의 사항과 검사시기에 대해 언급하였다. 안면신경의 근전도검사에서는 잡파의 혼입과 신경손상 시 근전도 파형의 감별에 대해, 측면전파 반응 검사에서는 마취의 유지의 중요성에 대해 그리고 체성감각 유발전위검사에서는 환자를 좀더 자세하게 검사할 수 있도록 새로운 방법을 제안하였다. 위에 언급한 내용들을 토대로 검사한다면 수술 중 신경계 감시 검사를 원활하게 할 수 있으리라 생각된다.

한국산 생약제들의 혈압강하작용에 대한 연구 II. 한국산 후박수피의 혈압강하 작용 (Pharmacological Action of Machilus Thunbergii Siebold Zuccarini)

  • 조병헌;김인호;이상복;조규철;이종화
    • 대한약리학회지
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    • 제15권1_2호
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    • pp.45-56
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    • 1979
  • With a view to searching after a new antihypertensive or hypotensive agents in the botanical crude plants, authors intended to reevaluate several natural products caltivated in Korea. This experiment was undertaken to compare pharmacogical actions of Machilus thunbergii Siebold et Zuccarini with those of Magnolia obovata Thunberg in anesthetized rats and in normal mice. Machilus thunbergii Sieb. et Zucc., a tree belonging to the Lauraceae family, is caltivated at Ull-ung Do, and their cortecies have been used as folk medicine mingled with those of Magnolia obovata Thunberg. These two cortecies have teen also applied in chinese medicine, it was advocated that these cortecies exerted good therapeutic effects on gastritis, convulsive abdominal pain, nausea, vomiting and urinary tract disorders. Therefore, we intended to determine the pharmacological action of two palnt of different family each other, especially their effects on blood pressure and heart rate, and also their mechanism of action were observed. We studied their action with extracts of hexane(MTHE), ether(MTEE), methanol(MTME) and water(MTWE) from Machilus thunhergii Sieb. et Zucc., and also fractionations of methanol(MOME), chloroform(MOCE) and water(MOWE) from Mapolia obovata Thunberg. The results of this experiment were as follows; 1) MTME, when intravenously administered to rats, elicited the significant hypotensive responses dependent on the administered dosage. 2) MOWE was also exhibited the hypotensive effect dependent on the treated dose. 3) Depressor effect of MTME was blocked by pretreatment with hexamethonium. 4) The hypotensive response of MOWE was blocked by pretreatment with hexamethonium or hrdralazine. 5) HTME and MOWE were also observed the anticonvulsive effect and sedative effect. These results suggested that MTME may induce the hypotensive response via central sympathetic effect, but the site of action in brain are not clarified, and the hypotensive effect of MOWE may be due to dual mechanism of central sympathetic action and direct vasodilation of blood vessel.

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뇌성마비의 침자(鍼刺) 치료에 대한 문헌적 고찰 -최근 중의잡지를 중심으로- (A Literature Study on Acupuncture for Cerebral Palsy -Based on the Current Traditional Chinese Medical Journals-)

  • 하수연;민상연;김장현
    • 대한한방소아과학회지
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    • 제23권1호
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    • pp.205-228
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    • 2009
  • Objectives The purpose of this study is to investigate the current acupuncture therapy of cerebral palsy. Methods We investigated the Chinese clinical papers which were published in the last 10 years(from 1999 to 2008). We found these papers from the oriental medical library in university and we also used the China National Knowledge Infrastructure(CNKI) through the internet and selected 32 papers for analyzing. Results Most papers were described the effect of acupuncture or acupoint-injection. This is more effective way to treat than the general rehabilitation treatment such as the physical therapy, the occupational therapy, and the speech therapy. Acupuncture or acupoint-injection has overall $80{\sim}100%$ of rehabilitation rate. The younger the children were, the longer the treatment period was, and the more successful in treatment. The acupuncture was often used with the general acupuncture and scalp acupuncture. Commonly used major acupuncture points were sishencong(四神聰), bohui(百會), zusanli(足三里), yundongqu(運動區), pinghengqu(平衡區), quchi(曲池), and sanyinjiao(三陰交). Commonly used main meridian pathways were bladder, governor vessel, gallbladder, large intestine, stomach, small intestine meridian. Head is the common site for acupuncture. The main acupoint-injection points were zusanli(足三里), dazhui(大椎), shenshu(腎兪), yamen(啞門), neiguan(內關), and fengchi(風池). For the injection, brain activator, ganglioside M1, cerebroprotein hydrolysate, cytidine diphosphate choline, Vit B1, Vit B12, the salviae root, the safflower were commonly used. Conclusions Acupuncture and acupoint-injection have been shown as an effective treatment on cerebral palsy. The acupuncture was used often the general acupuncture and scalp acupuncture all together. Commonly used main acupuncture points were sishencong, bohui, zusanli, yundongqu, pinghengqu, quchi, sanyinjiao.

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Acute Spontaneous Subdural Hematoma due to Rupture of a Tiny Cortical Arteriovenous Malformation

  • Choi, Hyuk Jin;Lee, Jae Il;Nam, Kyoung Hyup;Ko, Jun Kyeung
    • Journal of Korean Neurosurgical Society
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    • 제58권6호
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    • pp.547-549
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    • 2015
  • Acute subdural hematoma (SDH) of arterial origin is rare, especially SDH associated with an arteriovenous malformation (AVM) is extremely rare. The authors report a case of acute spontaneous SDH due to rupture of a tiny cortical AVM. A 51-year-old male presented with sudden onset headache and mentality deterioration without a history of trauma. Brain CT revealed a large volume acute SDH compressing the right cerebral hemisphere with subfalcine and tentorial herniation. Emergency decompressive craniectomy was performed to remove the hematoma and during surgery a small (5 mm sized) conglomerated aciniform mass with two surrounding enlarged vessels was identified on the parietal cortex. After warm saline irrigation of the mass, active bleeding developed from a one of the vessel. The bleeding was stopped by coagulation and the vessels were removed. Histopathological examination confirmed the lesion as an AVM. We concluded that a small cortical AVM existed at this area, and that the cortical AVM had caused the acute SDH. Follow up conventional angiography confirmed the absence of remnant AVM or any other vascular abnormality. This report demonstrates rupture of a cortical AVM is worth considering when a patient presents with non-traumatic SDH without intracerebral hemorrhage or subarachnoid hemorrhage.

비구, 비체(鼻涕), 비색(鼻塞), 비연(鼻淵)의 침구치료(鍼灸治療)에 관(關)한 문헌적(文獻的) 고찰(考察) (The study of literature review on acupuncture & moxibustion treatment for allergic rhnitis, nasal diacharge(鼻涕), stuffy nose(鼻塞), and rhinorrlea with turbid discharge(鼻淵))

  • 김영화;이병렬
    • 혜화의학회지
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    • 제8권2호
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    • pp.259-272
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    • 2000
  • About the acupuncture & moxibustion therapy of allergic rhnitis, nasal discharge(鼻涕), stuffy nose(鼻塞), and rhinorrlea with turbid discharge(鼻淵), the results are obtained as follows: 1. It appeared that the reasons for allergic rhnitis are the lung's contacting to Wind-Coid(風寒), Damhwa(痰火), and accumulated fever of stomach, the reasons for nasal discharge(鼻涕) is the Cold-Hot of a lung. the reasons for stuffy nose(鼻塞) is the harmonization of the Lung(肺氣), the reasons for the rhinorrlea with turbid discharge(鼻淵) are the heat of the Brain(腦熱), heat of the Gallbladder(膽熱), most probably. 2. When we do a acupuncture & moxibustion therapy for the allergic rhnitis, we used P'ungmun(風門), Shinjong(神庭), mostly. For the nasal diacharge(鼻涕) ; Yonghyang(迎香), P'ungmun(風門), Sangsong(上星) and Sugu(水溝) were the most useful acupuncture point. For the stuffy nose(鼻塞) ; Sangsong(上星), Yonghyang(迎香), Hapkok(合谷), and Sugu(水溝) were used most frequently. For the rhinorrlea with turbid discharge(鼻淵); Sangsong(上星), Hapkok(合谷), Yonghyang(迎香), and P'ungji(風池) were the best acupuncture point. 3. Concerning the frequencies of the acupuncture & moxibustion therapy for these four symptoms, Bladder Meridian(膀胱經) and Governor Vessel Meridian(督脈) were the most useful ones. As to the acupuncture point, Sangsong(上星), Yonghyang(迎香), Sugu(水溝) and Hapkok(合谷) were used most repeatedly.

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