**Core Concept**
X-rays are a type of electromagnetic radiation used in medical imaging for diagnostic purposes. The modification of X-rays can affect their interaction with body tissues, leading to varying degrees of absorption and contrast in images.

**Why the Correct Answer is Right**
The correct answer is related to the process of modifying X-rays to optimize their interaction with body tissues. When X-rays are modified, they are altered in terms of their energy or intensity, allowing for better visualization of specific structures or tissues. This modification can be achieved through various techniques, such as adjusting the voltage of the X-ray tube, using filters, or employing different X-ray energies (e.g., kilovoltage peak (kVp) or milliamperage (mA)). The modified X-rays interact with the body's tissues, leading to differences in attenuation, which is ultimately reflected in the resulting image.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a valid method for modifying X-rays. While X-rays can be filtered, this option is too vague and does not provide a clear mechanism for modification.
**Option B:** This option is incorrect because it refers to a characteristic of X-ray detectors rather than a method for modifying X-rays. X-ray detectors are used to capture and measure the intensity of X-rays, but they do not modify the X-rays themselves.
**Option C:** This option is incorrect because it refers to a type of X-ray image rather than a method for modifying X-rays. Computed Tomography (CT) scans involve the use of X-rays, but they do not modify the X-rays themselves; rather, they use multiple X-ray beams and detectors to reconstruct images.

**Clinical Pearl / High-Yield Fact**
When interpreting X-ray images, it is essential to consider the technical factors that influenced the image, including the X-ray energy (kVp) and intensity (mA). Understanding these factors can help clinicians optimize image quality and minimize artifacts.

**Correct Answer:** D.