Tech 2 Midterm

An increase in wavelength creates a higher frequency.

This is a factor which influences the grayscale on a digital radiograph:

A solenoid is which one of these, with an applied current.

Potential difference is;

Which type of imaging contributes to a higher patient dose?

AEC controls the ________________ of radiation reaching the image receptor.

The power equation is:

A DIPOLE is _____

Electrical Resistance is measured in______.

PHI is

As matrix size increases, what happens to spatial resolution

The study of distribution of charges or electrons at rest is called_______.

An example of an artificial permanent magnet is a(n) ______.

The thicker body part should be placed under the anode side of the tube.

A device that converts electrical energy to mechanical energy is a

A rectification circuit is found on the ______ of the x-ray circuit.

IDR and DDR are similar in that they both can contain this component: 

A rectification circuit is found on the ______ of the x-ray circuit.

What is the most common type of transformer?

Ferromagnetic material

A step-up transformer results in

Federal regulations require that AEC terminates @ 600 mAs above 50 kVp.

DDR does not contain the scintillation step, whereas IDR does.

Which of the following devices is strictly found in Indirect DR systems only?

The autotransformer is found on the

Physical components, including input and output devices, processing systems and memory/storage devices are called

Which of the following is aka the turns ratio:

Paramagnetic material:

A transformer with 100 turns on the primary coil and 50 turns on the secondary coil is a step down transformer.

tube filament material

The mathematical relationship between the factors of current, potential difference and resistance is known as;

PACS is a picture archiving network for digital images. Only X-ray and CT images are allowed to be stored.

The smallest exposure difference which can be detected and displayed by the imaging system is: 

The stator is located in the xray tube

The voltage ripple for a high-frequency generator will be ________.

A DEL is a: 

This provides resistance in the xray circuit by providing a small, narrow wire in which to create thermionic emission

Calculate the turns ratio of a step up transformer with 50 secondary turns and 10 primary turns.

Geometrical factors contributing to an increase in resistance in a conductor include;

Which of these will matrices will create an image with the greatest spatial resolution?

Max amount of leakage radiaton allowable by law:

This is the portion of the beam which is responsible for forming the image:

A system with greater bit depth capabilities will display images that contain higher:

A photodiode is a device which converts:

Current is measured in _____.

As pixel size increases what happens to the spatial resolution of an image?

The study of electric charges in motion is

Another term for a variable transformer is a(n);

Permeability is the ability of a material to stay magnetized.

The effective beam is more intense on which side? (anode heel effect)

Electron flow moves from____.

Magnetic field lines can be visualized by __________.

The process of electrical fields acting on one another without contact is called______.

This material is efficient at converting xray photons into an electrical signal:  (hint: no light conversion)

Voltage is measured in

Flat panel detector DR (TFT) is DDR or it can be IDR.

What is the rectification constant for a high frequency generator (used in HU equation)

With mutual induction, to induce voltage in the secondary coil, there must be