Abstract:
Radiologists use an "Overall impression" rating to assess a suspicious region on a mammogram. The value ranges from
1 to 5. They will definitely send a patient for biopsy if the rating is 4 or 5. They will send the patient for core biopsy
when a rating of 3 (indeterminate) is given. We have developed three methods to aid diagnosis of cases with
microcalcifications.The first two methods, namely, Bayesian and multiplelogistic regression (with a special "cutting
score" technique), utilise six parameter ratings which minimise subjectivity in characterising the microcalcifications.
The third method uses three parameters(age of patient, uniformity of size of microcalcification and their distribution)
in a multiple stepwise regression.For both training set and test set, all three methods are as good as the two radiologists
in terms of percentages of correct classification.Therefore, all three proposed methods potentially can be used as
second readers.
