Abstract: The present disclosure provides systems and methods for medical imaging. The method may include obtaining a plurality of channels of electrocardiogram (ECG) signals of a heart of a subject; identifying, from the plurality of channels of ECG signals, a target channel of ECG signal, wherein an amplitude of a characteristic wave of the target channel of ECG signal is the maximum amplitude among amplitudes of corresponding characteristic waves of the plurality of channels of ECG signals; and causing, based on the target channel of ECG signal, an imaging device to perform a scan operation on the heart of the subject.

Abstract: A circuit board includes a first surface, a second surface and a number of metal pads. The metal pads are arranged on the first surface and/or the second surface. The metal pads on a same side of the circuit board are arranged at intervals along a first direction. The metal pads include a first ground metal pad, a second ground metal pad and a signal metal pad. The circuit board further includes an adjustment opening. The adjustment opening is located beside the signal metal pad along the first direction and is close to the signal metal pad. The adjustment opening is configured to reduce the dielectric constant of the circuit board to improve high frequency performance of at least part of the metal pads. An electrical connector having the circuit board is also disclosed.

Abstract: An electrical connector includes an insulating body, a number of conductive terminals and a metal cage. The metal cage includes a first metal shell and a second metal shell. The first metal cage includes a wall portion. The second metal shell includes a retaining portion. The retaining portion includes a first locking hole, a first buckle tab and a first abutting surface. The wall portion includes a first locking protrusion retained in the first locking hole. The first locking protrusion includes a first retaining groove and a first limiting surface. The first abutting surface abuts against the first locking protrusion to restrict the second metal shell. The first limiting surface abuts against the first buckle tab to limit an excessive displacement of the second metal shell. A connector assembly having the electrical connector is also disclosed.

Abstract: A receptacle connector assembly includes a receptacle connector and a metal cage. The metal cage includes a first insertion space and a first opening located at a rear end of the first insertion space. The receptacle connector is accommodated in the metal cage through the first opening. The metal cage includes a first wall portion, a second wall portion, a third wall portion and a fourth wall portion which are enclosed to form a first frame. The third wall portion and/or the fourth wall portion is provided with a first guide protrusion protruding into the first insertion space. The first guide protrusion is configured to be inserted into a slot of a plug connector, thereby improving the mating stability. A connector assembly having the receptacle connector assembly is also disclosed.

Abstract: The present disclosure discloses a protective sleeve used for matching with a cable of a cable connector. The protective cover is used to be fixed on the cable to prevent the cable from being excessively bent. The present disclosure also discloses a cable connector assembly having the protective sleeve. Compared with the prior art, the present disclosure is capable of preventing the cable from being excessively bent by providing the protective cover fixed on the cable.

Abstract: The present disclosure provides systems and methods for medical imaging. The method may include obtaining a plurality of channels of electrocardiogram (ECG) signals of a heart of a subject; identifying, from the plurality of channels of ECG signals, a target channel of ECG signal, wherein an amplitude of a characteristic wave of the target channel of ECG signal is the maximum amplitude among amplitudes of corresponding characteristic waves of the plurality of channels of ECG signals; and causing, based on the target channel of ECG signal, an imaging device to perform a scan operation on the heart of the subject.

Abstract: The present disclosure provides a strap unlocking mechanism adapted for a cable plug and a connector. The strap unlocking mechanism comprises an elastic latch, a strap and an abutting rod. The elastic latch comprises a locking portion and an unlocking elastic piece disposed on the cable plug. The unlocking elastic piece is connected to one side of the locking portion. One end of the strap is connected with the unlocking elastic piece. The abutting rod is disposed on the cable plug and abuts against a surface of the strap close to the unlocking elastic piece. A first pull end and a second pull end are defined on the strap by the abutting rod. The extension direction of the first pull end and the extension direction of the second pull end being different.

Abstract: Provided is a plug and a connector assembly, which belong the technical field of connectors. The plug includes an insulating body, a cable and a circuit board. The insulating body includes a body part and a mating part which extends forwardly from the body part. The cable and the circuit board are electrically connected. The circuit board has an inserting part which protrudes forwardly out of the mating part. An outer side of the mating part is provided with a limiting groove and a guiding wall disposed within the limiting groove, and the guiding wall is adjacent to the inserting part and is capable of guiding insertion of the plug into a socket and preventing the plug from shaking in an up-down direction and/or in a left-right direction when the plug is inserted into the socket. The connector assembly includes the plug and the socket.

Abstract: Provided is a plug and a connector assembly, which belong the technical field of connectors. The plug includes an insulating body, a cable and a circuit board. The insulating body includes a body part and a mating part which extends forwardly from the body part. The cable and the circuit board are electrically connected. The circuit board has an inserting part which protrudes forwardly out of the mating part. An outer side of the mating part is provided with a limiting groove and a guiding wall disposed within the limiting groove, and the guiding wall is adjacent to the inserting part and is capable of guiding insertion of the plug into a socket and preventing the plug from shaking in an up-down direction and/or in a left-right direction when the plug is inserted into the socket. The connector assembly includes the plug and the socket.