PMID- 31153228
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201001
IS  - 1089-7623 (Electronic)
IS  - 0034-6748 (Print)
IS  - 0034-6748 (Linking)
VI  - 90
IP  - 5
DP  - 2019 May
TI  - A multifunction digital receiver suitable for real-time frequency detection and 
      compensation in fast magnetic resonance imaging.
PG  - 053707
LID - 10.1063/1.5092312 [doi]
LID - 053707
AB  - We describe the development and implementation of a multifunction digital 
      receiver suitable for magnetic resonance imaging with capability of real-time 
      frequency detection and compensation. The digital receiver consists primarily of 
      firmware modules that combine the functionalities of signal acquisition, 
      frequency detection and compensation, and data correction and image 
      reconstruction. The receiver was developed based on a single multiple-input 
      multiple-output radio-frequency electronic board equipped with a reconfigurable 
      Field Programmable Gate Array (FPGA) device. A simple and practical algorithm was 
      developed and implemented on the FPGA to accelerate the data processing for 
      frequency determination. The simplified frequency detection and the higher system 
      integration enable the receiver to reduce dramatically the time for frequency 
      detection and compensation. With this receiver, we are able to detect the 
      frequency of short-duration signals in the bandwidth of 10 MHz centered at 400 
      MHz within 75 ns after the signal acquisition. We describe the designs of the key 
      FPGA modules and how these modules integrate into a multifunction receiver. We 
      also present testing data that validate the simplified algorithm for frequency 
      determination, demonstrate frequency detection and compensation, and demonstrate 
      how real-time data correction is performed during image acquisition and 
      reconstruction.
FAU - Li, Limin
AU  - Li L
AUID- ORCID: 0000000307810594
AD  - Center for Basic MR Research, NorthShore University HealthSystem Research 
      Institute, Evanston, Illinois 60201, USA.
FAU - Wyrwicz, Alice M
AU  - Wyrwicz AM
AD  - Center for Basic MR Research, NorthShore University HealthSystem Research 
      Institute, Evanston, Illinois 60201, USA.
LA  - eng
GR  - R21 EB024852/EB/NIBIB NIH HHS/United States
PT  - Journal Article
PL  - United States
TA  - Rev Sci Instrum
JT  - The Review of scientific instruments
JID - 0405571
PMC - PMC6544506
EDAT- 2019/06/04 06:00
MHDA- 2019/06/04 06:01
PMCR- 2020/05/01
CRDT- 2019/06/03 06:00
PHST- 2019/06/03 06:00 [entrez]
PHST- 2019/06/04 06:00 [pubmed]
PHST- 2019/06/04 06:01 [medline]
PHST- 2020/05/01 00:00 [pmc-release]
AID - 003906RSI [pii]
AID - 1.5092312 [pii]
AID - 10.1063/1.5092312 [doi]
PST - ppublish
SO  - Rev Sci Instrum. 2019 May;90(5):053707. doi: 10.1063/1.5092312.