Physic Chapter 7

20問 • 1年前

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通報

問題一覧

The most widely use support structure for the x-ray tube is the ________.

ceiling support system

The external structure of the x-ray tube includes the support structure, the protective housing and the ___________.

glass envelope

As an x-ray tube ages, the inside can become coded with tungsten, which can cause ________ in the tube.

arcing

The negative side of the x-ray tube holds the ________.

filament

What is the most common cause of tube failure?

Tungsten vaporization

The filament is made of _________.

tungsten

Thermionic emission at the filament creates a _________.

space charge

The rotating anode is turned by a __________.

magnetic field

When electrons bombard the target, ____ % of their kinetic energy is converted to heat.

The target of the rotating anode is usually coated with a _______ alloy.

tungsten

The _________ is the source of radiation in the x-ray tube.

focal spot

Because of the line focus principal, the effective focal spot size decreases with decreasing ___________.

target angle

High capacity tube rotors revolve at ______ rpm.

10,000

The x-ray intensity is lower on the anode side of the two because of the ________.

heel effect

The cathode side of the tube should be directed toward the ______ part of the patient.

thicker

What is the formula for heat units for a 3-phase, 6-pulse x-ray machine

1.35 x kVp x mA x seconds

Tube failure can occur from _________.

long exposure times

The filament is an x-ray tube is about _____cm in length

1 to 2

A dual focus tube has two _________.

filaments

Each tube has its own rating chart to show ___________.

maximum exposure times

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問題一覧

The most widely use support structure for the x-ray tube is the ________.

ceiling support system

The external structure of the x-ray tube includes the support structure, the protective housing and the ___________.

glass envelope

As an x-ray tube ages, the inside can become coded with tungsten, which can cause ________ in the tube.

arcing

The negative side of the x-ray tube holds the ________.

filament

What is the most common cause of tube failure?

Tungsten vaporization

The filament is made of _________.

tungsten

Thermionic emission at the filament creates a _________.

space charge

The rotating anode is turned by a __________.

magnetic field

When electrons bombard the target, ____ % of their kinetic energy is converted to heat.

The target of the rotating anode is usually coated with a _______ alloy.

tungsten

The _________ is the source of radiation in the x-ray tube.

focal spot

Because of the line focus principal, the effective focal spot size decreases with decreasing ___________.

target angle

High capacity tube rotors revolve at ______ rpm.

10,000

The x-ray intensity is lower on the anode side of the two because of the ________.

heel effect

The cathode side of the tube should be directed toward the ______ part of the patient.

thicker

What is the formula for heat units for a 3-phase, 6-pulse x-ray machine

1.35 x kVp x mA x seconds

Tube failure can occur from _________.

long exposure times

The filament is an x-ray tube is about _____cm in length

1 to 2

A dual focus tube has two _________.

filaments

Each tube has its own rating chart to show ___________.

maximum exposure times