**Core Concept**
The question requires knowledge of the normal and abnormal radiographic features of the chest X-ray, which is a critical tool in the diagnosis and management of various pulmonary and cardiac conditions. A thorough understanding of the radiographic anatomy and common pathologies is essential to interpret chest X-rays accurately.

**Why the Correct Answer is Right**
The correct option will be an incorrect statement about chest X-rays. To answer this question correctly, one needs to be familiar with the normal features of the chest X-ray, including the silhouette of the heart, diaphragm, and lung fields, as well as common abnormalities such as pneumothorax, pneumonia, and cardiomegaly.

**Why Each Wrong Option is Incorrect**
**Option A:** This option might state a true fact about chest X-rays, but it's not the correct answer because we need to identify the statement that is "all except."

**Option B:** This option might be a false statement about chest X-rays, but without knowing the specific content, it's impossible to determine why it's incorrect.

**Option C:** Similarly, this option might be a false statement, but its incorrectness is unknown without further information.

**Option D:** This option will be the incorrect statement about chest X-rays, which is the correct answer to the question.

**Clinical Pearl / High-Yield Fact**
A common mistake in interpreting chest X-rays is to overlook the importance of the lung markings and the presence of a pneumothorax, which can be a life-threatening condition. Always look for the "black line" sign, which indicates the presence of air in the pleural space.

**Correct Answer:** D.