Probabilistic segmentation of small metastatic brain tumors using liquid state machine ensemble

2021 ◽  
Author(s):  
Andrew M. Elliott ◽  
Cole Morgan ◽  
Carlo C. Torres ◽  
Caroline Chung
Keyword(s):  
Brain Tumors ◽  
Liquid State ◽  
State Machine ◽  
Metastatic Brain Tumors

MR findings of metastatic brain tumors

1993 ◽  
Vol 29 (3) ◽  
pp. 355
Author(s):  
Joong Mo Ahn ◽  
Kee Hyun Chang ◽  
Moon Hee Han ◽  
Sang Hoon Cha ◽  
Jae Wook Ryoo
Keyword(s):  
Brain Tumors ◽  
Metastatic Brain Tumors

Stereotactic radiosurgery in the treatment of adults with metastatic brain tumors

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Boryana M. Eastman ◽  
Vyshak A. Venur ◽  
Simon S. Lo ◽  
Jerome J. Graber
Keyword(s):  
Brain Tumors ◽  
Stereotactic Radiosurgery ◽  
Metastatic Brain Tumors

Gamma knife radiosurgery for metastatic brain tumors from lung cancer: a comparison between small cell and non—small cell carcinoma

2002 ◽  
Vol 97 ◽  
pp. 484-488 ◽  
Author(s):  
Toru Serizawa ◽  
Junichi Ono ◽  
Toshihiko Iichi ◽  
Shinji Matsuda ◽  
Makoto Sato ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Brain Tumors ◽  
Gamma Knife ◽  
Gamma Knife Radiosurgery ◽  
Small Cell ◽  
Metastatic Brain Tumors ◽  
Cell Lung Carcinoma ◽  
Content Type ◽  
Significant Difference ◽  
Fine Print

Object. The purpose of this retrospective study was to evaluate the effectiveness of gamma knife radiosurgery (GKS) for the treatment of metastatic brain tumors from lung cancer, with particular reference to small cell lung carcinoma (SCLC) compared with non-SCLC (NSCLC). Methods. Two hundred forty-five consecutive patients meeting the following five criteria were evaluated in this study: 1) no prior brain tumor treatment; 2) 25 or fewer lesions; 3) a maximum of three tumors with a diameter of 20 mm or larger; 4) no surgically inaccessible tumor 30 mm or greater in diameter; and 5) more than 3 months of life expectancy. According to the same treatment protocol, large tumors (≥ 30 mm) were surgically removed and the other small lesions (< 30 mm) were treated with GKS. New lesions were treated with repeated GKS. Chemotherapy was administered, according to the primary physician's protocol, as aggressively as possible. Progression-free, overall, neurological, qualitative, and new lesion—free survival were calculated with the Kaplan—Meier method and were compared in the SCLC and NSCLC groups by using the log-rank test. The poor prognostic factors for each type of survival were also analyzed with the Cox proportional hazard model. Conclusions. Tumor control rate at 1 year was 94.5% in the SCLC group and 98% in the NSCLC group. The median survival time was 9.1 months in the SCLC group and 8.6 months in the NSCLC group. The 1-year survival rates in the SCLC group were 86.5% for neurological survival and 68.9% for qualitative survival; those in the NSCLC group were 87.9% for neurological and 78.9% for qualitative survival. The estimated median interval to emergence of a new lesion was 6.9 months in the SCLC group and 9.8 months in the NSCLC group. There was no significant difference between the two groups for any type of survival; this finding was verified by multivariate analysis. The results of this study suggest that GKS appears to be as effective in treating brain metastases from SCLC as for those from NSCLC.

Does gamma knife surgery stimulate cellular immune response to metastatic brain tumors? A histopathological and immunohistochemical study

2005 ◽  
Vol 102 (Special_Supplement) ◽  
pp. 180-184 ◽  
Author(s):  
György T. Szeifert ◽  
Isabelle Salmon ◽  
Sandrine Rorive ◽  
Nicolas Massager ◽  
Daniel Devriendt ◽  
...  
Keyword(s):  
Immune Response ◽  
Brain Tumors ◽  
Gamma Knife ◽  
Cellular Immune Response ◽  
Lymphocytic Infiltration ◽  
Gamma Knife Surgery ◽  
Metastatic Brain Tumors ◽  
Content Type ◽  
Cellular Immune ◽  
Fine Print

Object. The aim of this study was to analyze the cellular immune response and histopathological changes in secondary brain tumors after gamma knife surgery (GKS). Methods. Two hundred ten patients with cerebral metastases underwent GKS. Seven patients underwent subsequent craniotomy for tumor removal between 1 and 33 months after GKS. Four of these patients had one tumor, two patients had two tumors, and one patient had three. Histological and immunohistochemical investigations were performed. In addition to routine H & E and Mallory trichrome staining, immunohistochemical reactions were conducted to characterize the phenotypic nature of the cell population contributing to the tissue immune response to neoplastic deposits after radiosurgery. Light microscopy revealed an intensive lymphocytic infiltration in the parenchyma and stroma of tumor samples obtained in patients in whom surgery was performed over 6 months after GKS. Contrary to this, extensive areas of tissue necrosis with either an absent or scanty lymphoid population were observed in the poorly controlled neoplastic specimens obtained in cases in which surgery was undertaken in patients less than 6 months after GKS. Immunohistochemical characterization demonstrated the predominance of CD3-positive T cells in the lymphoid infiltration. Conclusions. Histopathological findings of the present study are consistent with a cellular immune response of natural killer cells against metastatic brain tumors, presumably stimulated by the ionizing energy of focused radiation.

A Hardware Aware Liquid State Machine Generation Framework

2021 ◽  
Author(s):  
Shiying Wang ◽  
Ziyang Kang ◽  
Lei Wang ◽  
Shiming Li ◽  
Lianhua Qu
Keyword(s):  
Liquid State ◽  
State Machine

scholarly journals MET-05 Clinical investigation of treatment results and recurrence patterns of metastatic brain tumors from the viewpoint of postoperative irradiation

2020 ◽  
Vol 2 (Supplement_3) ◽  
pp. ii19-ii19
Author(s):  
Tetsuo Hashiba ◽  
Haruka Kawano ◽  
Katsuya Ueno ◽  
Qiang Lee ◽  
Haruna Isozaki ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Brain Tumors ◽  
Clinical Investigation ◽  
Postoperative Radiotherapy ◽  
En Bloc Resection ◽  
Metastatic Brain Tumors ◽  
Treatment Results ◽  
En Bloc ◽  
Postoperative Radiation Therapy ◽  
Observation Period

Abstract While whole brain radiation therapy (WBRT) had been the standard postoperative radiation therapy for metastatic brain tumors for long time, recently local radiation therapy (LRT) has be become to be a new standard due to the accumulation of clinical evidences. Treatment results and pattern of recurrence were retrospectively analyzed from view point of postoperative radiotherapy. In this study, totally 69 patients were included and they were divided into WBRT group or LRT group. We analyzed the number of lesions, treated era, overall survival after diagnosis of metastasis (OS), recurrence free survival after RT (RFS), and patterns of recurrences. The subjects consisted of 37males and 32 females and average age was 61.7 years old. There were 49 cases in the WBRT group and 20 cases in the LRT group. While all cases before November 2017 had WBRT performed, LRT was adopted mainly in cases with a small number of metastases since December 2017. Although there was a difference in the observation period between the two groups, OS tended to be longer in the LRT group (P=0.08), while RFS tended to be shorter in the LRT group (P=0.08). Radiological recurrence after RT was observed in 7 cases in both groups, and in WBRT group, all cases were local recurrence, whereas in LRT group, all cases were new lesions or disseminated recurrence. Although there are biases such as the difference in observation period between the two groups and the tendency to adopt WBRT in cases with a large number of metastases, there is a possibility that postoperative LRT is not inferior to WBRT, especially for cases with a small number of metastases. However, we have experienced some cases of disseminated recurrence, and so it is necessary to consider the resection fashion such as whether en-bloc resection or piece meal resection when selecting postoperative RT.

Chaotic Liquid State Machine

2015 ◽  
Vol 9 (4) ◽  
pp. 1-20
Author(s):  
Mario Antoine Aoun ◽  
Mounir Boukadoum
Keyword(s):  
Liquid State ◽  
State Machine ◽  
Spiking Neurons ◽  
Signature Verification ◽  
Time Varying ◽  
Plasticity Mechanism ◽  
Online Signature ◽  
Online Signature Verification ◽  
One Class Classifier ◽  
Classification Capability

The authors implement a Liquid State Machine composed from a pool of chaotic spiking neurons. Furthermore, a synaptic plasticity mechanism operates on the connection weights between the neurons inside the pool. A special feature of the system's classification capability is that it can learn the class of a set of time varying inputs when trained from positive examples only, thus, it is a one class classifier. To demonstrate the applicability of this novel neurocomputing architecture, the authors apply it for Online Signature Verification.

scholarly journals Surgical management of brain metastases

2007 ◽  
Vol 22 (3) ◽  
pp. 1-7 ◽  
Author(s):  
Moksha G. Ranasinghe ◽  
Jonas M. Sheehan
Keyword(s):  
Brain Tumors ◽  
Systemic Disease ◽  
Postoperative Management ◽  
Study Data ◽  
Preoperative Imaging ◽  
Metastatic Brain Tumors ◽  
Patients With Cancer ◽  
Proper Patient Selection ◽  
Positive Effect

✓Metastatic brain tumors continue to increase in incidence as patients with cancer live longer. The options for management continue to evolve as well, with advances in radiation-based treatment, chemotherapy, and surgery. Although metastatic brain tumors are frequently treated without surgical intervention, there continues to be a significant role for surgery in caring for patients with these lesions. Study data have proven that surgery has a positive effect on survival and quality of life in properly selected patients. Those with a suitable age, functional status, systemic disease control, and several metastases may be suitable for surgical treatment. Advances in preoperative imaging and planning as well as intraoperative surgical adjuncts have lowered the morbidity associated with resection. With proper patient selection and operative and postoperative management, resection continues to play a significant and evolving role in the care of patients with metastatic brain tumor.

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