• International Journal of Computer Science & Network Security
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• 제24권2호
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• pp.43-52
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• 2024

Medical imaginings assume a important part in the analysis of tumors and cerebrospinal fluid (CSF) leak. Magnetic resonance imaging (MRI) is an image segmentation technology, which shows an angular sectional perspective of the body which provides convenience to medical specialists to examine the patients. The images generated by MRI are detailed, which enable medical specialists to identify affected areas to help them diagnose disease. MRI imaging is usually a basic part of diagnostic and treatment. In this research, we propose new techniques using the 4D-MRI image segmentation process to detect the brain tumor in the skull. We identify the issues related to the quality of cerebrum disease images or CSF leakage (discover fluid inside the brain). The aim of this research is to construct a framework that can identify cancer-damaged areas to be isolated from non-tumor. We use 4D image light field segmentation, which is followed by MATLAB modeling techniques, and measure the size of brain-damaged cells deep inside CSF. Data is usually collected from the support vector machine (SVM) tool using MATLAB's included K-Nearest Neighbor (KNN) algorithm. We propose a 4D light field tool (LFT) modulation method that can be used for the light editing field application. Depending on the input of the user, an objective evaluation of each ray is evaluated using the KNN to maintain the 4D frequency (redundancy). These light fields' approaches can help increase the efficiency of device segmentation and light field composite pipeline editing, as they minimize boundary artefacts.

• Journal of Yeungnam Medical Science
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• 제12권2호
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• pp.282-291
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• 1995

1994년 4월 1일부터 8월 31일까지 영남대학 의과대학 부속병원 신경과에 내원한 환자중에서 뇌척수액 검사를 시행한 환자 50례를 대상으로 혈청과 뇌척수액의 HBV 검출률과 HBV의 감염과 신경계질환의 관련성을 알아보기 위해 혈청과 뇌척수액에서 HBV 표식자를 검출하여 다음과 같은 결과를 얻었다. 혈청 HBV 표식자 검출로 HBsAg 양성률은 12.0%, HBV 감염률은 74.0% 이었으며, HBV에 의한 감염을 표식자 검출 양상에 따라 A군은 12.0%, B군은 62.0%이었고, C군은 26.0%이었다. 뇌척수액 HBV 표식자 검출로 HBsAg 양성률은 6.0%, HBV 감염률은 36.0%이었으며, A군은 100.0%, B군은 38.7%이었고, C군에서는 검출되지 않았다. 신경계 질환별로 분류하면 VDA군은 26명, NVAD군은 24명이었다. 혈청 HBV 감염률은 VAD군은 88.5%, NVAD군은 58.3%로 두 군간의 유의한 상관관계가 있었다(p<0.05). 뇌척수액의 HBV 표식자 검출은 VAD군 53.8%, NVAD군 16.7% 검출되었다 (p<0.05). VAD군에서 혈청 HBV 감염이 있는 경우 60.9%, NVAD군은 28.6%에서 뇌척수액 HBV 표식자가 검출되었으며, 대상환자의 수가 적어 두 군간의 통계학적 유의수준은 없었다. 이상의 결과로 보아 혈청 HBV 표식자가 검출되는 경우 일부 뇌척수액에서 HBV 표식자가 검출되며, 혈청 HBsAg 양성일때 검출률이 증가하고, 바이러스와 연관된 신경계 질환에서 혈청과 뇌척수액의 HBV의 검출률이 높았다.

• Journal of Korean Neurosurgical Society
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• 제39권1호
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• pp.20-25
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• 2006

Objective : The authors analyze prospectively the result of transcranial doppler[TCD] in normal pressure hydrocephalus and compared its cerebral blood flow parameters to radionuclide cerebrospinal fluid[CSF] flow study, postoperative brain computed tomography[CT] findings and clinical outcome, and studied the relationship between cerebral hemodynamics and clinical performance. Methods : Twenty five patients with hydrocephalus undertook pre- and post-operative TCD but only preoperative CSF flow study was performed. Mean flow velocity[Vm], pulsatility index[PI] and resistance index[RI] were assessed through TCD and changes in ventricle size and cortical gyral atrophy were checked through brain CT. Results : Postoperative hydrocephalus showed an increase in Vm[ACA P=0.037, MCA P=0.034], decrease in PI[ACA P=0.019, MCA P=0.017] and decrease in RI [ACA P=0.017, MCA P=0.021] compared to preoperative TCD parameters in the postoperative improvement group. In the postoperative improvement group, postoperative TCD parameters correlated with CSF flow study grade [Vm : $R^2=-0.75$, PI : $R^2=0.86$, RI : $R^2=0.78$] and ventriculocranial ratio change correlated with PI change [$R^2=0.73$]. The convexity gyral atrophy and initial TCD parameters showed close relationship to outcome. Conclusion : PI and RI can be used as an indicator of post operative prognosis, and with the addition of CSF flow study values, can also be used as a tool to predict pre-op and post-op patient status and successful shunt surgery.

• The Korean Journal of Pain
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• 제26권4호
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• pp.336-346
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• 2013

Intrathecal drug delivery is an effective and safe option for the treatment of chronic pathology refractory to conventional pain therapies. Typical intrathecal administered drugs are opioids, baclofen, local anesthetics and adjuvant medications. Although knowledge about mechanisms of action of intrathecal drugs are every day more clear many doubt remain respect the correct location of intrathecal catheter in order to achieve the best therapeutic result. We analyze the factors that can affect drug distribution within the cerebrospinal fluid. Three categories of variables were identified: drug features, cerebrospinal fluid (CSF) dynamics and patients features. First category includes physicochemical properties and pharmacological features of intrathecal administered drugs with special attention to drug lipophilicity. In the second category, the variables in CSF flow, are considered that can modify the drug distribution within the CSF with special attention to the new theories of liquoral circulation. Last category try to explain inter-individual difference in baclofen response with difference that are specific for each patients such as the anatomical area to treat, patient posture or reaction to inflammatory stimulus. We conclude that a comprehensive evaluation of the patients, including imaging techniques to study the anatomy and physiology of intrathecal environment and CSF dynamics, could become essential in the future to the purpose of optimize the clinical outcome of intrathecal therapy.

• 한국임상수의학회지
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• 제34권5호
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• pp.388-391
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• 2017

A 8-month-old, spayed female, Domestic shorthair cat lived in a shelter was presented with pelvic limbs ataxia and dysuria. Serum biochemical profile abnormalities were hyperproteinemia and decreased albumin/globulin (A:G) ratio (0.70). Results of cerebrospinal fluid (CSF) analysis were mixed cells pleocytosis with predominance neutrophils and an increase in protein concentration. In addition, feline coronavirus was detected by realtime RT-PCR in CSF. Magnetic resonance imaging (MRI) findings revealed lesions of the lumbar spinal cord. Based on clinical signs, MR finding, CSF analysis and realtime RT-PCR result in CSF, this case was diagnosed as feline infectious peritonitis (FIP) associated meningomyelitis. Although prednisolone and mycophenolate mofetil were administrated, clinical signs were not resolved and progressed to tetraplegia and coma status. This case presentation describes that feline infectious peritonitis virus could affect the lumbar spinal cord only and cause meningomyelitis with pelvic limbs ataxia without other neurological signs.

• Journal of Korean Neurosurgical Society
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• 제59권1호
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• pp.52-57
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• 2016

Objective : Many surgeons advocate for watertight dural reconstruction after posterior fossa surgery given the significant risk of cerebrospinal fluid (CSF) leak. Little evidence exists for posterior fossa dural reconstruction utilizing monolayer collagen matrix onlay graft in a non-watertight fashion. Our objective was to report the results of using collagen matrix in a non-watertight fashion for posterior fossa dural reconstruction. Methods : We conducted a retrospective review of operations performed by the senior author from 2004-2011 identified collagen matrix (DuraGen) use in 84 posterior fossa operations. Wound complications such as CSF leak, infection, pseudomeningocele, and aseptic meningitis were noted. Fisher's exact test was performed to assess risk factor association with specific complications. Results : Incisional CSF leak rate was 8.3% and non-incisional CSF leak rate was 3.6%. Incidence of aseptic meningitis was 7.1% and all cases resolved with steroids alone. Incidence of palpable and symptomatic pseudomeningocele in follow-up was 10.7% and 3.6% respectively. Postoperative infection rate was 4.8%. Previous surgery was associated with pseudomeningocele development (p<0.05). Conclusion : When primary dural closure after posterior fossa surgery is undesirable or not feasible, non-watertight dural reconstruction with collagen matrix resulted in incisional CSF leak in 8.3%. Incidence of pseudomeningocele, aseptic meningitis, and wound infection were within acceptable range. Data from this study may be used to compare alternative methods of dural reconstruction in posterior fossa surgery.

• Neurospine
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• 제15권4호
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• pp.338-347
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• 2018

Objective: Patients with extradural spine tumors are at an increased risk for intraoperative cerebrospinal fluid (CSF) leaks and postoperative wound dehiscence due to radiotherapy and other comorbidities related to systemic cancer treatment. In this case series, we discuss our experience with the management of intraoperative durotomies and wound closure strategies for this complex surgical patient population. Methods: We reviewed our recent single-center experience with spine surgery for primarily extradural tumors, with attention to intraoperative durotomy occurrence and postoperative wound-related complications. Results: A total of 105 patients underwent tumor resection and spinal reconstruction with instrumented fusion for a multitude of pathologies. Twelve of the 105 patients (11.4%) reviewed had intraoperative durotomies. Of these, 3 underwent reoperation for a delayed complication, including 1 epidural hematoma, 1 retained drain, and 1 wound infection. Of the 93 uncomplicated index operations, there were a total of 9 reoperations: 2 for epidural hematoma, 3 for wound infection, 2 for wound dehiscence, and 2 for recurrent primary disease. One patient was readmitted for a delayed spinal fluid leak. The average length of stay for patients with and without intraoperative durotomy was 7.3 and 5.9 days, respectively, with a nonsignificant trend for an increased length of stay in the durotomy cases (p=0.098). Conclusion: Surgery for extradural tumor resections can be complicated by CSF leaks due to the proximity of the tumor to the dura. When encountered, a variety of strategies may be employed to minimize subsequent morbidity.

• Journal of Korean Neurosurgical Society
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• 제50권3호
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• pp.274-276
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• 2011

Spontaneous cerebrospinal fluid (CSF) leak is a recognized cause of spontaneous intracranial hypotension (SIH). Subdural hematoma (SDH) is a serious but rare complication of SIH. An autologous epidural blood patch at the CSF-leak site can effectively relieve SIH. We report a case of bilateral SDH with SIH caused by a CSF leak originating at the C1-2 level. A 55-year-old male complained of orthostatic headache without neurological signs. His symptoms did not respond to conservative treatments including bed rest, hydration and analgesics. Magnetic resonance imaging showed a subdural hematoma in the bilateral fronto-parietal region, and computed tomography (CT) myelography showed a CSF leak originating at the C1-2 level. The patient underwent successful treatment with a CT-guided epidural blood patch at the CSF-leak site after trephination for bilateral SDH.

• Journal of Pharmaceutical Investigation
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• 제25권3호spc1호
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• pp.7-20
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• 1995

Taurine, a ${\beta}-amino$ acid, plays an important role as a neuromodulator and is necessary for the normal development of the brain. Since de novo synthesis of taurine in the brain is minimal and in vivo studies suggest that taurine dose not cross the blood-brain barrier, we examined whether the choroid plexus, the blood-cerebrospinal fluid (CSF) barrier, plays a role in taurine transport in the central nervous system. The uptake of $[^3H]-taurine$ into ATP depleted choroid plexus from rabbit was substantially greater in the presence of an inwardly directed $Na^+$ gradient taurine accumulation was negligible. A transient in side-negative potential gradient enhanced the $Na^+-driven$ uptake of taurine into the tissue slices, suggesting that the transport process is electrogenic, $Na^+-driven$ taurine uptake was saturable with an estimated $V_{max}$ of $111\;{\pm}\;20.2\;nmole/g/15\;min$ and a $K_M\;of\;99.8{\pm}29.9\;{\mu}M$. The estimated coupling ratio of $Na^+$ and taurine was $1.80\;{\pm}\;0.122.$ $Na^+-dependent$ taurine uptake was significantly inhibited by ${\beta}-amino$ acids, but not by ${\alpha}-amino$ acids, indicating that the transporter is selective for ${\beta}-amino$ acids. Since it is known that the physiological concentration of taurine in the CSF is lower than that in the plasma, the active transport system we characterized may face the brush border (i.e., CSF facing) side of the choroid plexus and actively transport taurine out of the CSF. Therefore, we examined in vivo elimination of taurine from the CSF in the rat to determine whether elimination kinetics of taurine from the CSF is consistent with the in vitro study. Using a stereotaxic device, cannulaes were placed into the lateral ventricle and the cisterna magna of the rat. Radio-labelled taurine and inulin (a marker of CSF flow) were injected into the lateral ventricle, and the concentrations of the labelled compounds in the CSF were monitored for upto 3 hrs in the cisterna magna. The apparent clearance of taurine from CSF was greater than the estimated CSF flow (p<0.005) indicating that there is a clearance process in addition to the CSF flow. Taurine distribution into the choroid plexus was at least 10 fold higher than that found in other brain areas (e. g., cerebellum, olfactory bulb and cortex). When unlabelled taurine was co-administered with radio-labelled taurine, the apparent clearance of taurine was reduced (p<0.0l), suggesting a saturable disposition of taurine from CSF. Distribution of taurine into the choroid plexus, cerebellum, olfactory bulb and cortex was similarly diminished, indicating that the saturable uptake of taurine into these tissues is responsible for the non-linear disposition. A pharmacokinetic model involving first order elimination and saturable distribution described these data adequately. The Michaelis-Menten rate constant estimated from in vivo elimination study is similar to that obtained in the in vitro uptake experiment. Collectively, our results demonstrate that taurine is transported in the choroid plexus via a $Na^+-dependent,saturable$ and apparently ${\beta}-amino$ acid selective mechanism. This process may be functionally relevant to taurine homeostasis in the brain.

• Clinical and Experimental Pediatrics
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• 제49권10호
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• pp.1086-1092
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• 2006

목 적 : RSE는 드물지 않으며 사망률이 높고 신경학적 후유증을 많이 남길 수 있는 중증 질환이다. 본 연구는 소아 난치성 간질 중첩증에서 뇌척수액 백혈구 증가증이 임상적으로 어떤 의미를 가지는지 알아보기 위해 시행하였다. 방 법 : 1999년 1월부터 2006년 1월까지 경북대학교 병원 소아과에 난치성 간질 중첩증을 주소로 입원한 37명의 환아 중에서 뇌척수액 검사를 시행한 25명의 환아를 대상으로 의무기록을 토대로 후향적 조사하였고 뇌척수액 백혈구 증가증이 있는 군과 없는 군을 나누어 비교하고, RSE가 간질의 첫 증상이었던 환아와 이전에 간질로 치료 받고 있던 환아 군을 나누어 비교하였다. 결 과 : 25명의 환아 중 6명에서 뇌척수액 백혈구 증가증이 있었고, 뇌척수액 백혈구 증가증이 없는 군에서 사망률과 필요약물 투여량에 유의한 차이가 없었다. 치료 후 경과는 뇌척수액 백혈구 증가증이 있는 군의 생존자가 더 심한 후유증이 남은 것으로 보이나 중추신경계 감염이 원인인 환아들을 제외하면 두군에서 치료 후 경과에 큰 차이가 없었다. 뇌척수액 백혈구 증가증이 있는 환아 들은 모두 처음 경련이 발생한 환아 들이었다. 결 론 : RSE로 진행한 경련 환아들 중에서 감염의 증거가 있을 경우는 뇌척수액 검사가 빠른 시간 안에 시행되어 중추신경계 감염 등의 원인 질환이 밝혀져야 하겠으나, 감염의 가능성이 적은 경우는 뇌척수액 검사 시기를 신중이 결정하는 것이 바람직하다고 생각된다. 그리고 경한 뇌척수액 백혈구 증가증은 예후에 특정한 영향을 주지 않으므로 감염이 의심되지 않는 경우에는 항생제, 항바이러스제 등의 사용에 신중을 기해야 한다고 생각한다.