19 April 2004 Extracting numeric measurements and temporal coordinates from Japanese radiological reports
Author Affiliations +
Proceedings Volume 5371, Medical Imaging 2004: PACS and Imaging Informatics; (2004); doi: 10.1117/12.536404
Event: Medical Imaging 2004, 2004, San Diego, California, United States
Medical records are written mainly, in natural language. The focus of this study is narrative radiological reports written in natural Japanese. These reports cannot be used for advanced retrieval, data mining, and so on, unless they are stored, using a structured format such as DICOM-SR. The goal is to structure narrative reports progressively, using natural language processing (NLP). Structure has many different levels, for example, DICOM-SR has three established levels -- basic text, enhanced and comprehensive. At the enhanced level, it is necessary to use numerical measurements and spatial & temporal coordinates. In this study, the wording used in the reports was first standardized, dictionaries were organized, and morphological analysis performed. Next, numerical measurements and temporal coordinates were extracted, and the objects to which they referred, analyzed. 10,000 CT and MR reports were separated into 82,122 sentences, and 34,269 of the 36,444 numerical descriptions were tagged. Periods, slashes, hyphens, and parentheses are ambiguously used in the description of enumerated lists, dates, image numbers, and anatomical names, as well as at the end of sentences; to resolve this ambiguity, descriptions were processed, according to the order -- date, size, unit, enumerated list, and abbreviation -- then, the tagged reports were separated into sentences.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Takeshi Imai, Yuzo Onogi, "Extracting numeric measurements and temporal coordinates from Japanese radiological reports", Proc. SPIE 5371, Medical Imaging 2004: PACS and Imaging Informatics, (19 April 2004); doi: 10.1117/12.536404; https://doi.org/10.1117/12.536404


Trigram-based algorithms for OCR result correction
Proceedings of SPIE (March 17 2017)
Computerized Interactive Diagnostic Intelligence Center
Proceedings of SPIE (December 29 1982)
New trends in radiology workstation design
Proceedings of SPIE (May 16 2002)
Assisting the radiologist to greater accuracy
Proceedings of SPIE (April 11 1996)

Back to Top