Magnetic Resonance Imaging:StandarInstalasi
BangunanMRI
dan Pra -
Kamal BagarField Engineer –
MRIAFMI - Jateng
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MRI Construction Plan – 3TPlanning/review recommended space
Recommended SpaceMR750 – 3T
of 3D View of MR750– 3T
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MRI Construction Plan – 1.5 TPlanning/review recommended space
Recommended Space of MRSigna Creator/Explorer - 1.5T
3D View of MR450– 1.5T
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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
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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).
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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).
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)
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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
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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
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Quench PipeRequirement
The venting system (including supports)must be sized to withstand 2500 lbs(11125 N) helium flow reaction force atvent elbows
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