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New screening system for unruptured cerebral aneurysms; Combination of an expert system and DSA examination

Journal Article:

Abstract

We have designed a screening system to diagnose unruptured aneurysms, including the use of digital subtraction angiography (DSA). We surveyed 115 patients who had undergone clipping procedures after subarachnoid hemorrhage (SAH) and questioned them with regard to the subjective symptoms. Sixty-eight of 92 patients who returned the questionnaire reported, prior to rupture, headache,eye pain, and neck pain most frequently, and also impairment of extraocular movements, ptosis, visual field defects, and motor and sensory disturbances. Nineteen (47.5%) of 40 patients who had complete pain relief after surgery complained of headache from 1 week to 1 month before SAH. In addition, nine patients (22.5%) complained of headache for several years, and were also pain-free after surgery. For the indication of DSA, we employed an expert system based on fuzzy set theory. Seven groups of parameters are: Group 1, a basic questionnaire concerning age, sex, and past and family histories; Group 2, 15 warning signs selected on the basis of retrospective study; and Groups 3-7, detailed questions concerning each sign. Scoring weights assigned to each condition based on the results of the retrospective study, and threshold values were determined by several neurosurgeons. The certainty factors for intermediate hypotheses were calculated from these weights  More>>
Authors:
Samejima, Hirotsugu; Ushikubo, Yukio; Mizokami, Toru [1] 
  1. Toho Univ., Tokyo (Japan). School of Medicine; and others
Publication Date:
Aug 01, 1990
Product Type:
Journal Article
Reference Number:
JPN-90-012389; EDB-91-024072
Resource Relation:
Journal Name: Neurologia Medico-Chirurgica; (Japan); Journal Volume: 30:8
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; CEREBRUM; BIOMEDICAL RADIOGRAPHY; BLOOD VESSELS; EXPERT SYSTEMS; HEMORRHAGE; IMAGE PROCESSING; PAIN; VASCULAR DISEASES; BODY; BRAIN; CARDIOVASCULAR SYSTEM; CENTRAL NERVOUS SYSTEM; DIAGNOSTIC TECHNIQUES; DISEASES; MEDICINE; NERVOUS SYSTEM; NUCLEAR MEDICINE; ORGANS; PATHOLOGICAL CHANGES; PROCESSING; RADIOLOGY; SYMPTOMS; 550602* - Medicine- External Radiation in Diagnostics- (1980-)
OSTI ID:
6069842
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0387-2572; CODEN: NMCHB
Submitting Site:
JPN
Size:
Pages: 575-581
Announcement Date:

Journal Article:

Citation Formats

Samejima, Hirotsugu, Ushikubo, Yukio, and Mizokami, Toru. New screening system for unruptured cerebral aneurysms; Combination of an expert system and DSA examination. Japan: N. p., 1990. Web.
Samejima, Hirotsugu, Ushikubo, Yukio, & Mizokami, Toru. New screening system for unruptured cerebral aneurysms; Combination of an expert system and DSA examination. Japan.
Samejima, Hirotsugu, Ushikubo, Yukio, and Mizokami, Toru. 1990. "New screening system for unruptured cerebral aneurysms; Combination of an expert system and DSA examination." Japan.
@misc{etde_6069842,
title = {New screening system for unruptured cerebral aneurysms; Combination of an expert system and DSA examination}
author = {Samejima, Hirotsugu, Ushikubo, Yukio, and Mizokami, Toru}
abstractNote = {We have designed a screening system to diagnose unruptured aneurysms, including the use of digital subtraction angiography (DSA). We surveyed 115 patients who had undergone clipping procedures after subarachnoid hemorrhage (SAH) and questioned them with regard to the subjective symptoms. Sixty-eight of 92 patients who returned the questionnaire reported, prior to rupture, headache,eye pain, and neck pain most frequently, and also impairment of extraocular movements, ptosis, visual field defects, and motor and sensory disturbances. Nineteen (47.5%) of 40 patients who had complete pain relief after surgery complained of headache from 1 week to 1 month before SAH. In addition, nine patients (22.5%) complained of headache for several years, and were also pain-free after surgery. For the indication of DSA, we employed an expert system based on fuzzy set theory. Seven groups of parameters are: Group 1, a basic questionnaire concerning age, sex, and past and family histories; Group 2, 15 warning signs selected on the basis of retrospective study; and Groups 3-7, detailed questions concerning each sign. Scoring weights assigned to each condition based on the results of the retrospective study, and threshold values were determined by several neurosurgeons. The certainty factors for intermediate hypotheses were calculated from these weights and threshold values and summed up, from which the conclusion was obtained. Twelve new cases of unruptured cerebral aneurysm were diagnosed using this screening system. This system may improve the ability to diagnose cerebral aneurysms before rupture. (author).}
journal = {Neurologia Medico-Chirurgica; (Japan)}
volume = {30:8}
journal type = {AC}
place = {Japan}
year = {1990}
month = {Aug}
}