**Question:** High resolution is obtained with:

A. Long wavelengths
B. Short wavelengths
C. High frequency waves
D. Low amplitude waves

**Core Concept:** High resolution imaging in medical sciences refers to the ability to visualize fine details of anatomy, pathology or functions of organs and tissues. This is achieved through various imaging modalities using different wavelengths, frequencies, or qualities of waves that interact with the target structures.

**Why the Correct Answer is Right:** High resolution imaging is achieved by using short wavelengths (or high frequency waves) as they have more energy and interact more strongly with the target structures. In radiology, X-rays, gamma rays, and ultrasound waves are examples of short wavelengths that provide high resolution images. Short wavelengths can penetrate through tissues more efficiently than long wavelengths, allowing for better visualization of internal structures.

**Why Each Wrong Option is Incorrect:**

A. Long wavelengths (e.g., in infrared and microwave imaging) generally have low energy, resulting in poor penetration through tissues. This leads to inadequate visualization of internal structures and thus lowers resolution.

B. Low amplitude waves carry insufficient energy to effectively interact with the target structures and provide high resolution images. Examples include low-powered X-rays and low frequency ultrasound waves.

C. High frequency waves (e.g., in computed tomography (CT) and magnetic resonance imaging (MRI)) have shorter wavelengths compared to low frequency waves, but are not as short as the correct answer. High frequency waves can provide better resolution compared to low frequency waves but not as high as short wavelengths.

**Clinical Pearl:** In medical imaging, high resolution is crucial for accurate diagnosis and treatment planning. Understanding the principles of wavelength and penetration through tissues is essential for selecting the right imaging modality for specific clinical scenarios.

**Correct Answer:** B. High frequency waves (e.g., in computed tomography (CT) and magnetic resonance imaging (MRI)) have shorter wavelengths compared to low frequency waves, but are not as short as the correct answer. High frequency waves can provide better resolution compared to low frequency waves but not as high as short wavelengths.