American Society of Radiologic Technologist (ASRT) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the American Society of Radiologic Technologist Exam. Use flashcards and multiple-choice questions with hints and explanations. Your path to success begins here!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

In a 45° left posterior oblique (LPO) position for anteroposterior (AP) oblique projections of the chest, which lung field is best displayed?

The right lung field
The left lung field
Both lungs
Neither lung

The correct answer is: The left lung field

In a 45° left posterior oblique (LPO) position, the left lung field is best displayed due to the overlap and anatomy of the lungs in relation to the thoracic spine and heart. This positioning rotates the left lung posteriorly while moving the right lung anteriorly, allowing for better visualization of the left lung structures such as the left upper lobe and the left bronchial anatomy without significant superimposition from the heart and mediastinal structures. The right lung, although visible, is more obscured due to anatomical structures like the heart and the thoracic wall obstructing the view. The choice of an AP oblique projection in this position maximizes the clarity for the left lung while providing a similar effect of reducing overlap for the areas of interest within the left lung field, making it ideal for diagnostic imaging purposes.