Problems and Objectives for
Learning, Discussion, Review, and Self Assessment
Characteristics and Quality Factors
Resources and References
The Physical Principles of Medical
Explain the concept of contrast
sensitivity and it's significance in medical imaging.
Compare the contrast sensitivity
characteristics of general radiography and MRI for visualization of soft
Identify the common radiographic procedure that requires
the highest contrast sensitivity and explain why.
While looking at some general radiographs and mammograms,
identify some of the objects that represent anatomical
detail or very small signs of disease, estimate their dimensions.
Describe the basic relationship between image
blurring and visibility of
Compare and rank the various medical imaging modalities
with respect to blurring and visibility of detail.
NOTE: In later units we will learn the factors in each imaging modality
that have an effect on blurring and visibility of detail.
Describe the general appearance of
While looking at images from each modality identify the
image noise, Identify the modalities that appear
to produce images with relatively low noise, with relatively high noise.
Describe the effect of noise on visibility of objects
within an image and identify the object characteristic that might have reduced
visibility in the presence of noise. NOTE: In later units we will
learn the factors in each imaging modality that produce and have an effect on
Define and describe image artifact.
Recognize common image
artifacts in images from each modality. NOTE: In later units we
will learn the conditions and factors in each imaging modality that produce
and have an effect on artifacts
Identify and describe three possible types of
medical image distortion.
Identify and describe three major
viewing condition factors that have an effect on the visibility of
objects within a medical image.
Describe the factors that produce
optimum viewing conditions for medical images.
Describe the special viewing
conditions required in mammography and
explain how they are achieved.
Explain and compare the two characteristics of a diagnostic
procedure: sensitivity and
Define and briefly describe the clinical significance of:
True Positive, False Positive, True Negative, False
Sketch a receiver operating characteristic
(ROC) curve, label the scales, and describe
factors that determine the position of the human
Interpret the general results of a receiver operating
characteristic (ROC) analysis.
Briefly describe the clinical application of