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Radation Free: Non-Invasive:
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Uses X-rays (radation) to produce an image that is a showdow of dense structures. Potential Disadvantages - Supsicious areas need to be dense enough to be seen. |
Uses infrared sensors to detect heat and increased blood flow (angiogenesis). The heat images are analysed for any abnormalities or concerns. |
Uses high frequency sound waves. The images are analysed for an any abnormalities or concerns. |
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Anatomical (structural): Examines basis of changes caused by disease. Functional: Examines changes in metabolism, blood flow, regional chemical composition, and absorption. |
Anatomical Imaging Ability to locate the exact area of supicision. |
Funcitional Imaging Cannot locate the exact area of supicision. |
Anatomical Imaging Ability to locate the exact area of supicision. |
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Early Detection: |
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Used as an adjunctive imaging test. |
Used as an adjunctive Test. Cannot see fine detail; however, good at distinguishing solid masses from fluid filled. |
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Findings indicates increased susipicion: |
Biopsy is the only test that can determine if a suspected tissue area is cancerous. |
Biopsy is the only test that can determine if a suspected tissue area is cancerous. |
Biopsy is the only test that can determine if a suspected tissue area is cancerous. |
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May detect tumors in pre-invasive stage. |
May provide first signal that a problem is developing. Postive thermal imaging represents the highest known risk factor of potential development of breast cancer up to 10 times more significant than any family history. |
Ability to detect some cancers missed by mammography. | |||||
Sensitivity: the likelyness of how a test is to pick-up the presence of disease in a person. Less than 10% of cancers missed: |
Average Sensitivity: 80% 20% of cancers missed; women over age 50. --------------------------------------- Sensitivity under age 50: 60% 40% of cancers missed; women under age 50. |
Average Sensitivity: 90% 10% of cancers missed; all age groups.
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Average Sensitivity: 83% 17% of cancers missed; all age groups.
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Factors that can affect the imaging test detect? | |||||||
Hormone use; decreases sensitivity? |
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Large, dense and fibrocystic breast, resulting in reading difficulities. |
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Peripheral areas next to chest wall and inframammary sulcus cannot be visualized; in most women.. |
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Sources: Index Medicus – ACS, NEJM, JNCI, J Breast, J Radiology, J Clin Ultrasound / Index Medicus – Cancer, AJOG, Thermology / Text – Atlas of Mammography: New Early Signs in Breast Cancer / Text – Biomedical Thermology |
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