Mammography radiation used is
**Core Concept**
Mammography radiation involves the use of low-energy X-rays to produce images of the breast tissue, which is essential for detecting breast cancer and other abnormalities. The radiation dose and energy are carefully calibrated to minimize exposure while maintaining image quality.
**Why the Correct Answer is Right**
The correct answer is **molybdenum target**. Molybdenum has a low atomic number, which allows it to produce low-energy X-rays with a higher absorption coefficient for soft tissue. This is particularly useful in mammography, where the goal is to visualize the dense breast tissue without overexposing the patient. The molybdenum target is typically used in combination with a tungsten anode to produce a characteristic X-ray spectrum that is ideal for mammography.
**Why Each Wrong Option is Incorrect**
**Option A:** **Rhenium target** - While rhenium is a high-atomic-number target that can produce high-energy X-rays, it is not typically used in mammography due to its high absorption coefficient for soft tissue, which would result in overexposure.
**Option B:** **Cobalt source** - Cobalt-60 is a radioactive source used in some medical applications, but it is not used in mammography due to its high energy and low spatial resolution.
**Option C:** **Tungsten target** - While tungsten is often used in combination with molybdenum in mammography, it is not used as a standalone target due to its high atomic number, which would result in high-energy X-rays that are not ideal for mammography.
**Clinical Pearl / High-Yield Fact**
When performing mammography, it is essential to use a low-energy X-ray source, such as a molybdenum target, to minimize radiation exposure while maintaining image quality. This is particularly important in patients with dense breast tissue, where high-energy X-rays may not provide sufficient detail.
**Correct Answer: C. Tungsten target**