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> Looking for help to fix some artifacts on a Toshiba Opart MRI

Looking for help to fix some artifacts on a Toshiba Opart MRI

Tags: MRI, TOSHIBA

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Vic MayAl

Looking for help to fix some artifacts on a Toshiba Opart MRI

January 31, 2018 09:25

Hello, dear colleagues.
I am in trouble with a Toshiba Opart MRI system, and I am looking for help to fix artifacts that appear on head scan images. Artifacts appear just when I use QD head coil. Image is noisy and blurred in whatever secuence I use. This coil was already tested on another equipment, and images are good, with no artifacts. All other coils make clear images in any secuence.
I have already replaced the miniTCM, TRM, FSM and DRADM boards.
Can anybody give me a support to solve this problem? Any help will be highly appreciated.
Thanks in advance.
Best regards.
My e-mail: vijmaal@gmail.com

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Ramil Mirshanov

re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 01, 2018 04:44

Hi! Maybe next, in the field of action of the magnetic field, there are large metal objects such as car or metal sewer pipes???

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Vic MayAl

re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 02, 2018 03:54

Hi, Ramil.
Thanks a lot for replying.
I am not sure about that, but if were the case, would it affect just to QD Head coil? What about the other coils?
Do you have any other suggestion?
Best regards.

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Iosif Sogolov

re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 04, 2018 09:32

more likely it stays you to check the coil connecting box, there you know should be combined coil outputs to micro-TCM inputs: two ports 1 and 2, every of which has two channels A and B: 1A, 1B, 2A, 2B.

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Vic MayAl

re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 06, 2018 03:46

Hi, Iosif.
First of all, thanks a lot for responding.
I have the coil connecting box replaced and the mini- TCM, but with not success. The fail stays.
Do not you think that the problem is in the Faraday cage? If so, how can I check it?
Regards.

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Iosif Sogolov

re: re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 07, 2018 07:23

Hi, generally cabin leakage should have effect on all coils, may be different effect, but I think you have to see it on all coils. Probability of the leakage I think is not zero, but is not big - here could be sequence parametrers you use for head and so on.
I would prefer to expect, that the problem lays in control/supply to micro-TCM and Coil Connect. box or between micro-TCM and CCB. This two boards mostly define the difference in how particular coil is connected to the system. It is much more likely

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Vic MayAl

re: re: re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 12, 2018 05:14

Hi,Iosif.
Thanks a lot for replying.
I will check these boards.
What is CCB? Where is it located in?
Can wrong parameters generate such kind of artifacts on head secuences?
Thanks for your help.
Best regards.

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Iosif Sogolov

re: re: re: re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 13, 2018 04:41

Hi,
I meant the connection between noise and sequences very generally. In case the noise has narrow bandwidth such that it will be in the sequence bandwidth, you will may be see it in the picture. I don't know which noise you have, I could just suppose your system loose receive sensitivity to MR signal because of problems I told above.
CCB, excuse me, it's my abbreviation of Coil Connection Box.

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Vic MayAl

re: re: re: re: re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

March 05, 2018 09:42

HELLO, IOSIF.
THANKS A LOT FOR REPLYING.
I AM TAKING INTO ACCOUNT YOU SUGGESTIONS.
BEST REGARDS.

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Nicholas Cipriano

re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 23, 2018 04:05

Hello Vic,
Can you possibly attach a picture of the images (or send to my email nlcmedical@hotmail.com). You mentioned noisy AND blurry images on QD Head coil - these arte usually caused by 2 different things, so, i am need more info to help you.
Coil connection box stands out; however, you say you have already changed that. I would make sure the ground wires are securly attached from the coil box to the penn panel boards.
There is a small piggy back board (filter ID board) that is in line to the Mini-TCM - check that out.
First of all, how are your Daily QA numbers?

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Vic MayAl

re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

March 05, 2018 09:42

Hello, Nicholas.
First of all, thanks a lot for replying.
I will check what you say.
Thanks in advance.
Regards

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alex malk

re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 27, 2018 01:50

SCSI cable in computer cabinet-there are 2--replace both--this is an old problem on opart

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Vic MayAl

re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

March 05, 2018 09:42

Good morning, Alex.
Thanks a lot for answering to my post.
Can those cables generate any image quality problem on just one coil? Do not they cause a problem on other coils?
Best regards

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alex malk

re: re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

March 07, 2018 09:08

yes it can,head coil especially more sensitive to noise. usually faster seq, shows artifact more.

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alex malk

re: Looking for help to fix some artifacts on a Toshiba Opart MRI

February 27, 2018 01:50

SCSI cables ,there are 2

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Vic MayAl

re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

March 07, 2018 04:51

Hi, Alex.
Thanks a lot for replying.
What cables are you talking about? Where are they located?
Should I replace them?
Best regards.

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alex malk

re: re: re: Looking for help to fix some artifacts on a Toshiba Opart MRI

March 08, 2018 09:46

From my memory,the host computer,SGI,on back,there is black cable multi pin(88pin?) that connects to board on top row on boards on the front..-cannot think its name..the other cable,SGI to DVD recorder.Black cable likely bad.Again,symptom is artifact or missing data in image,high TR seq.,more in Head coil than any other.--Before finding this bad cable I spent many OT hours!

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