Exam 1: Dental Radiography: Historical Perspective and Future Trends

The positioning indicating device (PID) is sometimes called a "cone" because the PID of early dental x-ray machines was of a pointed shape.

In the early 1900s dental patients would have to be sent to hospitals or a physician's office to have a dental radiograph exposed.

Computed tomography eliminates the use of radiation to produce an image.

The PID is used to direct the useful beam of radiation.

The paralleling technique is based on the rule of isometry.

Early dental film required long exposure times because:

Early dental x-ray machines were an electrical hazard.

Digital imaging replaces the conventional dental x-ray machine.

Who was awarded the first Nobel Prize for physics in 1901, for his experimental work with radiation?

What medical imaging modality records a selected plane of tissues?

Each of the following is a potential use of dental radiographs EXCEPT one. Which one is the EXCEPTION?

In dental digital imaging systems, what replaces film?

The most significant advancement in the early days of radiography came in 1913 when W. D. Coolidge:

What New Orleans dentist first made practical use of x-rays in the treatment of dental patients?

Each of the following is an advantage of digital imaging EXCEPT one. Which one is the EXCEPTION?

C. Edmund Kells encouraged the practical use of radiographs in dentistry.

A radiograph is an image produced by exposure to x-rays.

The bisecting technique is the technique of choice for intraoral radiography.

Who developed the hot cathode ray tube?

Early researchers working in the field of radiography were not aware that continued exposure to x-rays produced accumulations of radiation effects in the body because x-rays are invisible.