LukasW Log
Hello Open Source Hardware World! Starting to Log the progress around www.opensourceimaging.org
please post pix on FB or somewhere and/or embed in here-MJ
Fri Sep 23, 2016
Presentation for the Science Hack Day Berlin 2016 [1] finished. Here you can find the presentation: [2] COSI-Measure: Bad news, Bas the creator of the Beagle Bone add on board BeBoPr++ apparently passed away [3], we need some alternative design now
Thu Sep 22, 2016
Gradient: Simulations done for the prototype, radius ~ 20cm -> Gradient strength ~30mT/m, Concept for the mechatronic subsystem of the gradient ready plus nice drawings by Eva [[]]
Wed Sep 21, 2016
Magnet: PMMA parts arrived, hurray! Now glueing can start of the first prototype magnet.
COSI-Measure: CAD files modification for limit switch holder and cable chain generated and send for 3D print. Cables and connectors ordered.
Tue Sep 20, 2016
Poster for World Health Summit finished. File:20160909 WHS Poster OpenSourceImaging LukasWinter.pdf
Mon Sep 19, 2016
RFPA: Transistor in power amp module down, input power to driver stage accidently too high hence input power at power amp too high. Solution: New LDMOS transistor ordered and damping at driver input will be included (hardware) to adjust the range to 0-1V (SDR output range). The damping can be replaced easily later on if another spectrometer is used, but a protection on hardware side is safer than on software side only.
Fri Sep 16, 2016
OSI outreach: Monthly team meeting yesterday (Simone, Haopeng, Ruben, Brian, Lukas). Targeting ISMRM Engineering Study group presentation slot at the next meeting (-> Simone), projectupload ongoing goal to reach 20 projects by october, fuse efforts with MR-Hub (talk to Brian Hargraeves and create project upload page)? Open up meistertask board and connect to slack, create guidelines page (license + legal framework + medical device development)
COSI hardware: RFPA: un-/blanking timing solved, 600A transistor and 0.1ohm resistor solves the timing issue after blanking, now we are at around 100müs after transmit pulse until readout can be applied which is sufficient RF Coil: measurements done (Christian) at PTB with TEM cell and Frank Magnet: PMMA rings ordered, gradient simulations ongoing (-> Raphael) Measure: Finishing the cabling/connectors (-> Haopeng), modified 3D CAD chain holder needed (-> Lukas), motor coupler order did not arrive yet (26.08.)