If an implanted device has been tested and deemed safe for given field strength, it may be imaged at that field strength only – not lower and not higher. Each device must only be scanned using the specific conditions under which it was tested. Testing includes: (select all that apply)

Safety associated with particular device

Device interference with image quality

Physics 2 Quiz 3.1

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Questions: 17 | Attempts: 91 | Updated: Dec 4, 2023

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Physics 2 Quiz 3.1

The following potential projectiles should not be brought into the MR scanner room. (select all that apply)

Many facilities prefer to delay any exam of pregnant patients until after the third trimester, then have a written consent form signed by the patient before the exam.

MR conditional is an item that has been demonstrated to pose __________ hazards in a specified MRI environment with specified conditions of use.

It is advised that all personnel exposed to the magnetic environment are educated about potential risks and hazards of the static magnetic field. These personnel include: (select all that apply)

As of July, 2004, the FDA limits for static magnetic field strengths for adults and children over one month of age is _______?

Peripheral nerve stimulation are effects experienced during MRI exams during IR sequences and include mild cutaneous sensations and involuntary muscle contractions.

SAR is used to calculate an expected increase in body temperature during an average examination, and limits for the head, which are calculated over a 10 minute time period, is ______?

Zone IV access Is the region in which free access by unscreened non-MR personnel and/or ferromagnetic objects and equipment can result in serious injury of death.

Zone IV is suitable for ___________ patients.

MR unsafe 1 is an object that is considered to pose a potential or realistic risk or hazard to a patient or individual in the MR environment primarily as the result of movement or dislodgment of the object.

IEC/FDA limits for localized heating include head normal mode limit – 38^oC or 3.2W/kg

As in any medical procedure, the decision to scan or not to scan is a medical one, and any medical decision is to be made on a case by case basis by the technologist and determined on a risk vs. benefit basis.

If an implanted device has been tested and deemed safe for given field strength, it may be imaged at that field strength only – not lower and not higher. Each device must only be scanned using the specific conditions under which it was tested. Testing includes: (select all that apply)

The MR Safety white paper was intended to provide guidelines for MR imaging facilities for the development and implementation of safety policies and procedures.

It may be acceptable to scan some patients with implanted pacer wires as long as the wires are close to the skin and are not looped outside the chest. This decision needs to be made by the radiologist, and the patient should be told to squeeze the panic ball if they feel any heating in the area.

If cochlear implants are attracted to the magnetic field and were magnetically or electronically activated, then they are contraindicated for MRI.

Every implant or device must be tested under the __________ conditions that it will experience during MR imaging

Physics 2 Quiz 3.1

The following potential projectiles should not be brought into the MR scanner room. (select all that apply)

Many facilities prefer to delay any exam of pregnant patients until after the third trimester, then have a written consent form signed by the patient before the exam.

MR conditional is an item that has been demonstrated to pose __________ hazards in a specified MRI environment with specified conditions of use.

It is advised that all personnel exposed to the magnetic environment are educated about potential risks and hazards of the static magnetic field. These personnel include: (select all that apply)

As of July, 2004, the FDA limits for static magnetic field strengths for adults and children over one month of age is _______?

Peripheral nerve stimulation are effects experienced during MRI exams during IR sequences and include mild cutaneous sensations and involuntary muscle contractions.

SAR is used to calculate an expected increase in body temperature during an average examination, and limits for the head, which are calculated over a 10 minute time period, is ______?

Zone IV access Is the region in which free access by unscreened non-MR personnel and/or ferromagnetic objects and equipment can result in serious injury of death.

Zone IV is suitable for ___________ patients.

MR unsafe 1 is an object that is considered to pose a potential or realistic risk or hazard to a patient or individual in the MR environment primarily as the result of movement or dislodgment of the object.

IEC/FDA limits for localized heating include head normal mode limit – 38oC or 3.2W/kg

As in any medical procedure, the decision to scan or not to scan is a medical one, and any medical decision is to be made on a case by case basis by the technologist and determined on a risk vs. benefit basis.

If an implanted device has been tested and deemed safe for given field strength, it may be imaged at that field strength only – not lower and not higher. Each device must only be scanned using the specific conditions under which it was tested. Testing includes: (select all that apply)

The MR Safety white paper was intended to provide guidelines for MR imaging facilities for the development and implementation of safety policies and procedures.

It may be acceptable to scan some patients with implanted pacer wires as long as the wires are close to the skin and are not looped outside the chest. This decision needs to be made by the radiologist, and the patient should be told to squeeze the panic ball if they feel any heating in the area.

If cochlear implants are attracted to the magnetic field and were magnetically or electronically activated, then they are contraindicated for MRI.

Every implant or device must be tested under the __________ conditions that it will experience during MR imaging

IEC/FDA limits for localized heating include head normal mode limit – 38^oC or 3.2W/kg