The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2025
Filed:
May. 23, 2023
Fujifilm Healthcare Corporation, Kashiwa, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
In an MRI apparatus, a dynamic range of an MR signal is extended without increasing the time for imaging nor manufacturing cost. The MRI apparatus is provided with a receiverconfigured to perform the A/D conversion on two-system nuclear magnetic resonance signals according to a direct sampling method. The receivercomprises a distributorconfigured to divide each of the nuclear magnetic resonance signals into two-system signals, an attenuatorconfigured to attenuate an overflowed signal outputted from the distributor, and a switchconfigured to switch between the signals having the same gain to output the switched signal. Also provided is a digital processing means having ADCs of the same number as that of the nuclear magnetic resonance signals to perform the AD conversion respectively for the two types of signals, restore the attenuated signals, and recombine the signals. After switching, the signals outputted with different gains are combined to increase the number of bits of digital data with respect to all the sampling points, thereby extending the dynamic range.