Journal of Korean Society of Medical Informatics.2009;15(2):245-246. doi:10.4258/jksmi.2009.15.2.245
Journal of Korean Society of Medical Informatics
1995 to Present ISSN: 1225-8903
Sort by
DISPLAY OPTIONS
Format:
Per page:
Wireless Clinical Trial of Data Capture using a Personal Digital Assistant.
Journal of Korean Society of Medical Informatics.2009;15(2):235-244. doi:10.4258/jksmi.2009.15.2.235
OBJECTIVE: Personal Digital Assistants (PDAs) have the potential to improve clinical trial data collection; however, most current PDA-based clinical data collection systems typically collect and store data in the offline mode, and then transfer the data to an operational database. The purpose of this study was to explore the usefulness of a wireless clinical data collection system for an irritable bowel syndrome trial compared with the traditional paper based data collection. METHODS: We have developed a PDA-based data capture system for clinical trials, and tested it in a double-blind trial. Sixty four patients with irritable bowel syndrome were randomly selected and divided into a control group that used the standard paper report forms (CRF) and an intervention group that used the electronic report forms (e-CRF), daily for five weeks. There were 630 data sets consisting of six questions each, and thus 3,570 data points total were collected. RESULTS: The response rate of the control group was significantly higher than that of the intervention group. However, the completeness of the response in the intervention group was higher and the number of input errors per person for the PDA group was lower than in the paper group. CONCLUSION: A PDA based electronic diary improved the response rate and decreased input errors in an IBS trial. We conclude that mobile devices can be very useful, especially when the proposed design and connectivity aspects have been taken into account.
Cellular Phone ; Computers, Handheld ; Data Collection ; Electronics ; Electrons ; Humans ; Irritable Bowel Syndrome
Cellular Phone ; Computers, Handheld ; Data Collection ; Electronics ; Electrons ; Humans ; Irritable Bowel Syndrome
A Study on Pupil and Iris Segmentation of the Anterior Segment of the Eye.
Journal of Korean Society of Medical Informatics.2009;15(2):227-234. doi:10.4258/jksmi.2009.15.2.227
OBJECTIVE: The goal of this study was to develop a novel pupil and iris segmentation algorithm. We evaluated segmentation performance based on a fractal model. Two methods were compared: Daugman's and our new proposed method. METHODS: We received 200 anterior segment images with 3,872x2,592 pixels. Here we present an active contour model that accurately detects pupil boundaries in order to improve the performance of segmentation systems. We propose a method that uses iris segmentation based on a fractal model. We compared the performance of Daugman's method and the proposed new method and statistically analyzed the results. RESULTS: We manually compared segmentation with the Daugman's method and the new proposed method. The findings showed that the proposed segmentation accuracy was about 2.5 percent higher than Daugman's method. There was a significant difference (p<0.05) between the under and over data between the two methods. CONCLUSION: The results of this study show that the new proposed method was more accurate than the conventional method for the measurement of segmentation of the eye by CAD (Computer-aided Diagnosis).
Eye ; Fractals ; Iris ; Pupil
Eye ; Fractals ; Iris ; Pupil
Image Analysis Quantifying Microvessel Density in Renal Cell Carcinoma.
Journal of Korean Society of Medical Informatics.2009;15(2):217-225. doi:10.4258/jksmi.2009.15.2.217
OBJECTIVE: The most widely used method for quantifying new blood vessel growth in tumor angiogenesis is the determination of microvessel density, which is reported to be associated with tumor progression and metastasis, and a prognostic indicator of patient outcome. In this study, we propose a method for the determination of microvessel density by image analysis, to improve the accuracy and the objectivity of determination of the microvessel density. METHODS: Four-micron-thick tissue sections of renal cell carcinoma samples were stained immunohistochemically for CD34. The regions with a high degree of vascularization were selected by an expert for digitization. Each image was digitized as a 24-bits/pixel image file with a resolution of 640x480 pixels. First, segmentation of the microvessels based on pixel classification using color features in hybrid color space was performed. After use of a correction process for microvessels with discontinuities and separation of touching microvessels, we counted the number of microvessels for the microvessel density measurement. RESULTS: The result was evaluated by comparison with manual quantification of the same images. The comparison revealed that our computerized microvessel quantification was highly correlated with manual counting by a pathologist. CONCLUSION: The results indicate that our method is better than the conventional computerized image analysis methods.
Blood Vessels ; Carcinoma, Renal Cell ; Chimera ; Diagnosis, Computer-Assisted ; Glycosaminoglycans ; Humans ; Microvessels ; Neoplasm Metastasis
Blood Vessels ; Carcinoma, Renal Cell ; Chimera ; Diagnosis, Computer-Assisted ; Glycosaminoglycans ; Humans ; Microvessels ; Neoplasm Metastasis
Registration of Cadaver's Sectioned Images to Patient's Head MRIs.
Journal of Korean Society of Medical Informatics.2009;15(2):209-216. doi:10.4258/jksmi.2009.15.2.209
OBJECTIVE: Cadaver's sectioned images with high resolution and real color could be used as the source of realistic three-dimensional images. If the sectioned images are registered to a patient's MRIs, three-dimensional images with high resolution and real color that fit the patient, can be produced; the three-dimensional images enable realistic virtual surgery for the patient. The objective of this study was to verify the registration of a cadaver's sectioned images to a patient's head MRIs. METHODS: The sectioned images of the heads of cadaver were associated with segmented images selected at 3 mm intervals. The patient had his head MR scanned at 3 mm intervals; the MRIs were segmented. Software to register the cadaver's sectioned images to the patient's MRIs was developed. On this software, the corresponding dots were identified on both the sectioned images and the MRIs either manually or automatically using segmented images. RESULTS: The registered sectioned images corresponded to the patient's MRIs. Both manual and automatic registrations were satisfied. CONCLUSION: Further study is needed for registering sectioned images to actual patients.
Cadaver ; Head ; Humans ; Imaging, Three-Dimensional
Cadaver ; Head ; Humans ; Imaging, Three-Dimensional
Journal of Korean Society of Medical Informatics.2009;15(2):201-208. doi:10.4258/jksmi.2009.15.2.201
OBJECTIVE: This aim of this study was to evaluate the quality and agreement of electronic medical records with paper-based medical records. METHODS: Data was collected from the paper-based medical records generated during 2004 and electronic medical records during 2007, in patients hospitalized for arterial fibrillation. The categories evaluated included the chief complaint, history of present illness, past illness, medication history, admission history, family history, allergies, smoking history, and drinking history in admission record. RESULTS: The electronic medical records scored higher for: the existence of a medical record, level of information in the medical record and agreement of information. However, there were some categories of disagreement between the information from doctors and nurses, and there were several categories with no record by doctors or nurses. CONCLUSION: The results of this study confirmed that the quality of the electronic medical record is better than that of paper-based medical with regard to: the existence of the record, level and agreement of information. However, there are discrepancies in the information contained within both types of records.
Drinking ; Electronic Health Records ; Electronics ; Electrons ; Hospital Information Systems ; Humans ; Hypersensitivity ; Medical Records ; Smoke ; Smoking
Drinking ; Electronic Health Records ; Electronics ; Electrons ; Hospital Information Systems ; Humans ; Hypersensitivity ; Medical Records ; Smoke ; Smoking
Journal of Korean Society of Medical Informatics.2009;15(2):191-199. doi:10.4258/jksmi.2009.15.2.191
OBJECTIVE: Post-marketing surveillance (PMS) is an adverse events monitoring practice of pharmaceutical drugs on the market. Traditional PMS methods are labor intensive and expensive to perform, because they are largely based on manual work including phone-calling, mailing, or direct visits to relevant subjects. The objective of this study was to develop and validate a PMS methodology based on the clinical data warehouse (CDW). METHODS: We constructed a archival DB using a hospital information system and a refined CDW from three different hospitals. Fluoxetine hydrochloride, an antidepressant, was selected as the target monitoring drug. Corrected QT prolongation on ECG was selected as the target adverse outcome. The Wilcoxon signed rank test was performed to analyze the difference in the corrected QT interval before and after the target drug administration. RESULTS: A refined CDW was successfully constructed from three different hospitals. Table specifications and an entity-relation diagram were developed and are presented. A total of 13 subjects were selected for monitoring. There was no statistically significant difference in the QT interval before and after target drug administration (p=0.727). CONCLUSION: The PMS method based on CDW was successfully performed on the target drug. This IT-based alternative surveillance method might be beneficial in the PMS environment of the future.
Electrocardiography ; Fluoxetine ; Hospital Information Systems ; Postal Service ; Retrospective Studies
Electrocardiography ; Fluoxetine ; Hospital Information Systems ; Postal Service ; Retrospective Studies
Basic Concepts and Principles of Data Mining in Clinical Practice.
Journal of Korean Society of Medical Informatics.2009;15(2):175-189. doi:10.4258/jksmi.2009.15.2.175
Recently, many hospitals have been adopting clinical data warehouses (CDW) as well as electronic medical records. These new hospital information systems are inevitably introducing very large amounts of clinical data that might be useful for further analysis. However, the electronic clinical data in the CDW are usually byproducts of clinical practice rather than the product of research. Therefore, they include inconsistent and sometimes erroneous information that might not have the specific context of the clinical situations. Data miners usually have various academic backgrounds such as electronics, informatics, statistics, biomedicine, and public health. If the complex situations surrounding the clinical data are not well understood, investigators performing data mining in clinical fields may have problems assessing the information they are confronted with. Here, we would like to introduce some basic concepts on the principles of data mining in clinical fields including legal and ethical considerations as well as technical concerns.
Machine Learning ; Data Mining ; Electronic Health Records ; Electronics ; Electrons ; Hospital Information Systems ; Humans ; Informatics ; Public Health ; Research Personnel
Machine Learning ; Data Mining ; Electronic Health Records ; Electronics ; Electrons ; Hospital Information Systems ; Humans ; Informatics ; Public Health ; Research Personnel
Study of User Preference of Graphic User Interface in Laboratory Information System.
Journal of Korean Society of Medical Informatics.1997;3(1):351-354.
In order to elucidate employees satisfaction levels in using graphic user interface(GUI) in a laboratory information system(LIS), users attitudes toward GUI versus CUI(Character User Interface) in a similar LIS were surveyed one month after implementing upgrade version of LIS in a tertiary care university hospital laboratory. The outcome of the study showed that approximately two third of users preferred to have GUI in LIS. There was no difference in preference of GUI or not. However the female and older employees tend to shy away from GUI. The employee productivity was improved with GUI although it takes slightly longer program loading time than that of CUI. In conclusion, the laboratory employee satisfaction was higher with GUI than CUI and their productivity was improved with GUI.
Clinical Laboratory Information Systems* ; Efficiency ; Female ; Humans ; Laboratories, Hospital ; Tertiary Healthcare
Clinical Laboratory Information Systems* ; Efficiency ; Female ; Humans ; Laboratories, Hospital ; Tertiary Healthcare
Medical Counseling by Internet.
Journal of Korean Society of Medical Informatics.1997;3(1):267-274.
Recent progress in medical informatics enables us to use medical information regardless of time or place, to make a diagnostic and therapeutic plan, according to increasing need about health of general population. There are many homepages on the web, which provides medical common senses, hospital information, and medical counselling on the web. Virtual Hospital, which offers comprehensive media information, has medical counselling program with various programs such as self-diagnosis, emergency information, drug information, Q and A, and so on. The aim of this study is to examine the content and purpose of medical counselling on the web. The subjects consisted of 150 counselings which were called 'Medical Counselling' in the Virtual Hospital for December 1996 through March 1997. Many questioners wanted to know treatment principles. to make a diagnosis, and to know specific medical knowledge, The most common questions are as follows; general and unspecified, digestive, skin, musculoskeletal problems. These findings suggests that medical counselling may be used to supplement the lack of direct medical interviews with doctors.
Counseling* ; Diagnosis ; Emergencies ; Internet* ; Medical Informatics ; Skin
Counseling* ; Diagnosis ; Emergencies ; Internet* ; Medical Informatics ; Skin
Country
Republic of Korea
Publisher
Korean Society of Medical Informatics
ElectronicLinks
http://synapse.koreamed.org/LinkX.php?code=1088HIREditor-in-chief
Abbreviation
J Korean Soc Med Inform
Vernacular Journal Title
대한의료정보학회지
ISSN
1225-8903
EISSN
Year Approved
2007
Current Indexing Status
Currently Indexed
Start Year
1995
Description
Vol. 1, no. 1 (1995) - Vol. 15, no. 4 (2009)
Current Title
Powered by IMICAMS(
备案号: 11010502037788, 京ICP备10218182号-8)