magnetic resonance imaging: standar bangunan dan pra -...

Magnetic Resonance Imaging:StandarInstalasi

BangunanMRI

dan Pra -

Kamal BagarField Engineer –

MRIAFMI - Jateng

Why have to know this ?

••••

Tell somethingSafetyImage QualityArtefact

about QUENCH

QuenchWhen He liquid boil off

MRI Construction Plan – 3TPlanning/review recommended space

Recommended SpaceMR750 – 3T

of 3D View of MR750– 3T

MRI Construction Plan – 1.5 TPlanning/review recommended space

Recommended Space of MRSigna Creator/Explorer - 1.5T

3D View of MR450– 1.5T

Two magnet installation

Recommended Space of MRSigna Creator/Explorer - 1.5T

Temp and Humidity Requirement

System Heat OutputAirCooling Requirement

For Your InformationWhat if compressor down or not effective to exchange heat?

1 Magnet = 2000 liter of Heliquid

Compressor off, will dissipate5% Heliquid/day

5 % loseestimate)

= Rp 40 million (Rough

Sound dBNoise during scan

Sound dB comparisonJust FYI

,

ft (90 dB). Newspaper press (97

average factory, freight train (at Possible damage in 8 hour

40 mph at 50 ft (84 dB); diesel

Food blender (88 dB); milling

disposal (80 dB).

(77 dB); freeway at 50 ft from Upper 70s are annoyingly loud

Living room music (76 dB); radio

(70 dB).

Noise Source Decibel Level Decibel EffectBoeing 737 or DC-9 aircraft at 90 4 times as loud as 70 dB. Likely one nautical mile (6080 ft) damage in 8 hour exposure. before landing (97 dB); powermower (96 dB); motorcycle at 25

dB).

Garbage disposal, dishwasher, 80 2 times as loud as 70 dB.

15 meters). Car wash at 20 ft exposure.(89 dB); propeller plane flyoverat 1000 ft (88 dB); diesel truck

train at 45 mph at 100 ft (83 dB).

machine (85 dB); garbage

Passenger car at 65 mph at 25 ft 70 Arbitrary base of comparison.

pavement edge 10 a.m. (76 dB). to some people.

or TV-audio, vacuum cleaner

Noise Source Decibel Level Decibel EffectJet take-off (at 25 meters) 150 Eardrum ruptureRecommended product: Outdoor Noise Barriers

Aircraft carrier deck 140

Military jet aircraft take-off from 130 aircraft carrier with afterburnerat 50 ft (130 dB).

Thunderclap, chain saw. 120 Painful. 32 times as loud as 70Oxygen torch (121 dB). dB.

Steel mill, auto horn at 1 meter. 110 Average human pain threshold. Turbo-fan aircraft at takeoff 16 times as loud as 70 dB. power at 200 ft (118 dB).Riveting machine (110 dB); live rock music (108 - 114 dB).

Jet take-off (at 305 meters), use 100 8 times as loud as 70 dB.of outboard motor, power lawn Serious damage possible in 8 hr mower, motorcycle, farm tractor, exposure.jackhammer, garbage truck. Boeing 707 or DC-8 aircraft at one nautical mile (6080 ft) before landing (106 dB); jet flyover at 1000 feet (103 dB); Bell J-2A helicopter at 100 ft (100 dB).

http://www.industrialnoisecontrol.com/products/onb-outdoor-noise-barriers

http://www.industrialnoisecontrol.com/products/onb-outdoor-noise-barriers

Items which may generate or create RF interference(including florescence lighting) are not allowed forinstallation within the Magnet room

All lighting must use direct current (the DC must haveless than 5% ripple)

0

\ . I

Hydrogen PropertiesPrecession and Frequency

RF Shield Requirement - 3TLarmor Equation

1T =1.5T2T =3T =

42.58 MHz= 63.87 MHz85.16 MHz127.74 Mhz

Bo

The RF shielded room with installed blank penetration panels shall provide a minimum of100 dB of shielding effectiveness (SE) for the entire room at the following frequencies :127.72 MHz +/- 0.5 MHz102.20 MHz +/- 0.5 MHz153.30 MHz +/- 0.5 MHz

GroundingRequirement (Hospital provided)

Resistance between any two groundeddevices must not exceed 0.1 ohm toensure equal potential ground systemwithin the Magnet Room (ex : MGD,PDU, RF Shield, etc)

All

metallic pipes (including water,medical gas, sprinklers, etc.) entering theRF Shield, excluding the Cryogenic Vent and floor drains, must be located within56 inches (1422 mm)of the RF Common Ground Stud

Wall ConstructionPanelling

Quench PipeRequirement

The venting system (including supports)must be sized to withstand 2500 lbs(11125 N) helium flow reaction force atvent elbows

Power SpecMR750 –3T

Pre-installMR750

Manual– 3T

magnetic resonance imaging: standar bangunan dan pra -...

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