MR signal transmission in a local coil arrangement
First Claim
1. A magnetic resonance (MR) tomography local coil arrangement, comprising:
- at least one local coil configured to receive at least one MR reception signal, each MR reception signal having a reception signal frequency in the radio-frequency (RF) range;
at least one amplifier that amplifies the at least one MR reception signal;
a frequency converter circuit that generates at least one analog intermediate frequency signal from the at least one MR reception signal, said intermediate frequency signal having an intermediate frequency that differs from the reception signal frequency of each MR reception signal;
an analog-to-digital converter that converts the analog intermediate frequency signal into a digitized intermediate frequency signal;
a shielding device that shields against signals in the RF range, said shielding device surrounding at least the analog-to-digital converter;
at least one frequency filter between the at least one local coil and the analog-to-digital converter, the frequency filter having a transmission range for signals with the intermediate frequency of the intermediate frequency signal; and
a device that transmits the digitized intermediate frequency signal.
2 Assignments
0 Petitions
Accused Products
Abstract
In a magnetic resonance tomography local coil arrangement and a method for processing signals received thereby, at least one local coil is fashioned to receive at least one reception signal and at least one amplifier is provided that amplifies the at least one reception signal. A frequency converter generates at least one intermediate frequency signal from the at least one reception signal the intermediate frequency of the intermediate frequency signal differing from the reception signal frequency of each reception signal. An analog-digital converter converts the analog intermediate frequency signal into a digitized signal. A shielding device shields against at least radio-frequency signals, the shielding device surrounding at least the analog-digital converter. At least one frequency filter is arranged between the at least one local coil and the analog-digital converter, the frequency filter exhibiting a transmission range for signals with the intermediate frequency of an intermediate frequency signal. The digitized signal is transmitted from the local coil arrangement.
17 Citations
32 Claims
-
1. A magnetic resonance (MR) tomography local coil arrangement, comprising:
-
at least one local coil configured to receive at least one MR reception signal, each MR reception signal having a reception signal frequency in the radio-frequency (RF) range; at least one amplifier that amplifies the at least one MR reception signal; a frequency converter circuit that generates at least one analog intermediate frequency signal from the at least one MR reception signal, said intermediate frequency signal having an intermediate frequency that differs from the reception signal frequency of each MR reception signal; an analog-to-digital converter that converts the analog intermediate frequency signal into a digitized intermediate frequency signal; a shielding device that shields against signals in the RF range, said shielding device surrounding at least the analog-to-digital converter; at least one frequency filter between the at least one local coil and the analog-to-digital converter, the frequency filter having a transmission range for signals with the intermediate frequency of the intermediate frequency signal; and a device that transmits the digitized intermediate frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for operating a local coil arrangement of a magnetic resonance tomography apparatus, comprising the steps of:
-
with at least one local coil, receiving at least one MR reception signal, each MR reception signal having a reception signal frequency in the radio-frequency (RF) range; amplifying the at least one MR reception signal; with a frequency converter circuit, generating at least one analog intermediate frequency signal from the at least one MR reception signal, said intermediate frequency signal having an intermediate frequency that differs from the reception signal frequency of each MR reception signal; in an analog-to-digital converter, converting the analog intermediate frequency signal into a digitized intermediate frequency signal; shielding at least said analog-to-digital converter against signals in the RF range with a shielding device; providing at least one frequency filter between the at least one local coil and the analog-to-digital converter, the frequency filter having a transmission range for signals with the intermediate frequency of the intermediate frequency signal; and transmitting the digitized intermediate frequency signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
-
Specification