• Title/Summary/Keyword: Vasculature

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Maximum-Intensity Projection for Magnetic Resonance Angiography (Magnetic Resonance Angiography를 위한 Maximum-Intensity Projection을 구현)

  • Yi, Y.;Ryu, T.H.;Kim, S.S.;Kim, I.Y.;Lee, M.W.
    • Proceedings of the KOSOMBE Conference
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    • v.1997 no.05
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    • pp.484-488
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    • 1997
  • In this Paper, We use Maximum-Intensity Projection(MIP) algorithms. Maximum-Intensity Projection algorithms currently used for construction of magnetic resonance angiograms. The blood flow in a volume of interest is represented by bright intensities in the MR data volume. The flow within the vasculature shows up in the projections plane. By relating the intensities of the pixel to their location in the slice, the total number of pixels considered for the projection plane was reduced, thus saving calculation time. The algorithm was written in visual C++.

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An Intra abdominal Pulmonary Sequestration Containing Congenital Cystic Adenomatoid Malformation (Congenital, Cystic Adenomatoid Malformation을 보이는 복강내 폐분리증)

  • Lee, Suk-Koo;Lee, Woo-Yong;Kim, Hyun-Hahk
    • Advances in pediatric surgery
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    • v.2 no.2
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    • pp.138-142
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    • 1996
  • Pulmonary sequestration is a complex anomaly involving the pulmonary parenchymal tissue and its vasculature. It presents as a cystic mass of nonfunctional lung tissue without communication with the tracheobronchial system. Usually, it receives blood supply from anomalous systemic vessels. Therefore, preoperative diagnosis of the pulmonary sequestration is difficult, especially when it is located in the abdomen and combined with congenital cystic adenomatoid malformation(CCAM). We encountered such a mass(CCAM type 2) detected prenatally by ultrasonography. It was a kidney bean shaped, pinkish mass straddling the thorax and abdomen on the right side. Because of the sonographic appearance, neuroblastoma was diagnosed preoperatively. The mass was completely extirpated without difficulty.

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Anatomic basis for flap thinning

  • Park, Seong Oh;Chang, Hak;Imanishi, Nobuaki
    • Archives of Plastic Surgery
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    • v.45 no.4
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    • pp.298-303
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    • 2018
  • Flap thinning is a procedure for making a thick flap thinner. This procedure does more than simply fill in the defected area, and it is better for reconstructing the area both functionally and aesthetically. However, because flap thinning is a rather blind procedure, it may have harmful effects on flap vascularity. Therefore, the vasculature of a flap must be understood before performing flap thinning. This paper analyzes the basic anatomy underlying flap thinning based on the previous anatomic study that categorized flaps into 6 types by their vascular structures. This paper also reviews specific studies of frequently practiced flap procedures (deep inferior epigastric artery perforator flap, thoracodorsal artery perforator flap, and anterolateral thigh flap) and presents important precautions for flap thinning procedures. Finally, this paper briefly examines the axiality of the subdermal plexus, which needs to be taken into account when performing flap thinning.

WAVEs: A Novel and Promising Weapon in the Cancer Therapy Tool Box

  • Sakthivel, K.M.;Prabhu, V. Vinod;Guruvayoorappan, C.
    • Asian Pacific Journal of Cancer Prevention
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    • v.13 no.5
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    • pp.1719-1722
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    • 2012
  • The Wiskott-Aldrich Syndrome Protein family Verprolin - homologous proteins (WAVEs), encoded by a metastasis promoter gene, play considerable roles in adhesion of immune cells, cell proliferation, migration and destruction of foreign agents by reactive oxygen species. These diverse functions have lead to the hypothesis that WAVE proteins have multi-functional roles in regulating cancer invasiveness, metastasis, development of tumor vasculature and angiogenesis. Differentials in expression of WAVE proteins are associated with a number of neoplasms include colorectal cancer, hepatocellular cancer, lung squamous cell carcinoma, human breast adenocarcinoma and prostate cancer. In this review we attempt to unify our knowledge regarding WAVE proteins, focusing on their potentials as diagnostic markers and molecular targets for cancer therapy.

Cerebral Aneurysm and Aortic Coarctation in a 46, XY Female. Is it Causal or Coincidental?

  • Ju, Sun-Min;Yi, Hyeong-Joong;Ko, Yong;Kim, Kwang-Myung
    • Journal of Korean Neurosurgical Society
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    • v.37 no.2
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    • pp.137-140
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    • 2005
  • Most vascular disorders tend to affect both the brain and heart, and among them, a clinical syndrome constituting cerebral aneurysm and aortic coarctation(AC) has been well recognized. Persistent hypertensive impact to the cerebral vasculature with developmental anomaly of the neural crest, precursor of ectomenchymal, would be closely associated with development of the cerebral aneurysm in AC. Gonadal steroid hormone, a guardian of the cardiovascular system, has been known for its protective effects on the vascular wall. Gonadal steroid hormone (androgen) insensitivity such as 46,XY female syndrome may increase the risk of hypertention and subsequent vascular anomalies. The authors report on a 46-year-old 46,XY female patient with AC who underwent surgical clipping of the ruptured cerebral aneurysm. Clinical implications and proposed pathogenetic mechanisms of aneurysm in this intersex syndrome are presented and discussed.

The molecular pathophysiology of vascular anomalies: Genomic research

  • Kim, Jong Seong;Hwang, Su-Kyeong;Chung, Ho Yun
    • Archives of Plastic Surgery
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    • v.47 no.3
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    • pp.203-208
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    • 2020
  • Vascular anomalies are congenital localized abnormalities that result from improper development and maintenance of the vasculature. The lesions of vascular anomalies vary in location, type, and clinical severity of the phenotype, and the current treatment options are often unsatisfactory. Most vascular anomalies are sporadic, but patterns of inheritance have been noted in some cases, making genetic analysis relevant. Developments in the field of genomics, including next-generation sequencing, have provided novel insights into the genetic and molecular pathophysiological mechanisms underlying vascular anomalies. These insights may pave the way for new approaches to molecular diagnosis and potential disease-specific therapies. This article provides an introduction to genetic testing for vascular anomalies and presents a brief summary of the etiology and genetics of vascular anomalies.

$^{99m}Tc-Tin$ Colloid Uptake Ratio of Femoral Head in Healthy Korean (정상 한국인 대퇴골두의 $^{99m}Tc-Tin$ Colloid 섭취율)

  • Zhi, Won-Hee;Sohn, Hyung-Sun;Kim, Choon-Yul;Bahk, Yong-Whee
    • The Korean Journal of Nuclear Medicine
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    • v.23 no.2
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    • pp.215-218
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    • 1989
  • Tc-99m-tin colloid distribution in the hip is studied in 76 patients with no hepatic and hip disorder, because knowledge of normal uptake pattern in the hip is important in evaluation of femoral head vasculature after a fracture. The uptake in femoral head is decreased or disappeared with increasing age due to conversion of red marrow to white marrow.

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Hepatic Encephalopathy in a Dog (개의 간성 뇌증)

  • 반현정;황철용;김종민;윤화영;윤정희;오태호;한홍율
    • Journal of Veterinary Clinics
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    • v.18 no.3
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    • pp.293-296
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    • 2001
  • Hepatic encephalophthy was diagnosed with serum chemistry, abdominal radiography and ultrasonography in a 2.6kg, 4 year-old maltese dog showing signs of hypersalivation, involutary spasm of facial muscles, ataxia, behavior abnormalities like dullness, sleep disorder, restlessness. In serum chemistry, the level of alanine transferase and aspartate trasferase was mildly elevated, ammonia was severely increased. On abdominal radio-graphs, the size of liver was mildly decreased. In ultrasonographic examination, diffuse lesion with hyperechoic change and decreased vasculature were seen in the hepatic region. But vascular abnormalities of liver were not observed. Drug and dietary therapy were undertaken and severities of clinical sign were alleviated.

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Atrial Septal Defect in Dogs (개에서 심방중격결손의 증례)

  • 정주현;엄기동;장광호;오태호;이영원;장동우;윤정희
    • Journal of Veterinary Clinics
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    • v.19 no.1
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    • pp.110-113
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    • 2002
  • An atrial septal defect (ASD) is a congenital hole in the atrial septum that allows flow between the two atria. Small ASDs are usually well-tolerated defects and do not result in significant clinical abnormalities. In large ASDs or in the presence of other cardiac defects, clinically significancy is increased. Atrial septal defects in 2 Dogs with cardiac and respiratory signs were diagnosed at seoul animal medical center. In ascultation, systolic murmur and the splitting of second heart sound were heard at pulmonary or tricuspid valve region. In radiograph, right-sided cardiomegaly, pulmonary artery dilation, increased pulmonary vasculature makings, and pleural effusion or pulmonary edema signs were observed. In echocardiography, the region, location and size of septal defect was identified. Also, the direction and degree of shunt was measured. These dogs were treated with medicine for cardiac failure. One dog is well-tolerated, the other dog died.

Koebner Phenomenon Delays Therapeutic Effect of Pulsed Dye Laser on Refractory Psoriasis

  • Park, Jae Wan;Shin, Sun Hye;Han, Hye Sung;Yoo, Kwang Ho
    • Medical Lasers
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    • v.9 no.1
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    • pp.62-64
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    • 2020
  • Psoriasis is a common chronic inflammatory skin disease that is histopathologically characterized by abnormal differentiation and hyperproliferation of keratinocytes, infiltration of T lymphocytes, and alternations of the dermal vasculature. Pulsed dye laser (PDL) is commonly used to treat cutaneous vascular lesions, and it has been studied for the treatment of localized psoriatic lesions. A 30-year-old female patient with refractory psoriasis on her forehead was treated using PDL. After two sessions, the size of the psoriatic lesion increased, which might have occurred due to koebnerization. As the patient continued to receive PDL treatment, the lesion showed significant improvement with no recurrence on the one-year follow-up. We present here a case of refractory psoriasis treated with PDL and demonstrates an association between a delayed therapeutic effect and the Koebner phenomenon.