Attenuation in bone and lung is described as:

Attenuation in bone and lung is described as:

• A. Higher
• B. Lower
• C. Higher than muscle
• D. Extremely low

Answer: (C)

Attenuation is all about how density and composition affect X-ray absorption as the beam passes through tissues. Bone is dense and rich in minerals, so it absorbs and scatters more X-rays than muscle, giving it a higher attenuation. The lungs, being filled with air, are much less dense and attenuate X-rays far less—described as extremely low attenuation. So, describing attenuation as higher than muscle makes sense for bone, while the lungs behave quite differently. The main takeaway is that density drives attenuation: bone > muscle, while lung is much lower than muscle.

Attenuation is all about how density and composition affect X-ray absorption as the beam passes through tissues. Bone is dense and rich in minerals, so it absorbs and scatters more X-rays than muscle, giving it a higher attenuation. The lungs, being filled with air, are much less dense and attenuate X-rays far less—described as extremely low attenuation. So, describing attenuation as higher than muscle makes sense for bone, while the lungs behave quite differently. The main takeaway is that density drives attenuation: bone > muscle, while lung is much lower than muscle.