Open AccessDetermination of early bone metastasis on Bone Scans Usingthe Gray Levels Histogram
Author(s) -
Mónica Pérez-Meza,
Alberto Jaramillo-Núñez,
Bolivia Cuevas-Otahola,
J. A. Arriaga-Hernández,
Bárbara Sánchez-Rinza
Publication year - 2021
Language(s) - English
Resource type - Dissertations/theses
DOI - 10.17488/rmib.42.2.1
Subject(s) - histogram , gray level , bone metastasis , metastasis , region of interest , gray (unit) , pattern recognition (psychology) , medicine , artificial intelligence , radiology , computer science , image (mathematics) , cancer
The aim of this paper is to show a technique to speed up the interpretation of bone scans in order to determine the presence of early bone metastasis. This is done using the gray levels histogram of the region of interest. The technique is intended to assist in the bone scans interpretation in order to provide a successful diagnosis. During the analysis, three types of histograms were observed on the regions of interest. If the histogram is narrow and shifted toward the origin, the bone scan is free of metastasis. If it is shifted to the right and slightly broadened, indicates the presence of a bone anomaly different from a metastasis. On the other hand, if the histogram is more broadened and shifted to the right, is suggests the presence of metastasis. This histogram is characterized by displaying small curls on the right side providing information about the metastatic disease stage, which could be low-amplitude peaks and have a short length, if the metastasis is in early stage, or high-amplitude peaks and a long length, if is advanced. Finally, the analyzed region is displayed in false color considering the minimum gray levels observed in the histogram.