Abstract: A chemical-liquid injector includes a piston-driving mechanism (130) that moves a piston member of a syringe containing a contrast medium, which includes an actuator and a ram member which is moved back and forth by the actuator, a control circuit (150) which is electrically connected to the actuator, and an operating knob unit (170) which includes an operating knob that is to be operated by an operator, and a rotation sensor that outputs an electric signal corresponding to a rotation of the operating knob. The control circuit is configured to generate a predetermined control signal accordingly, on the basis of a signal from the rotation sensor, and the piston-driving mechanism is operated according to the control signal.

Abstract: A pushing unit is stopped just before abutting against a rear end of a syringe to reliably prevent unwanted extrusion of a chemical liquid from a syringe. An injecting apparatus for injecting a chemical liquid includes: an injection head to which a syringe filled with the chemical liquid is to be mounted; a pushing unit provided on the injection head and pushing a rear end of the syringe; a rear end detection unit provided on the injection head and detecting the rear end in a contactless manner; and a control unit configured to control the injection head, the control unit acquiring a forward movement distance that the pushing unit is to be moved forward after the rear end is detected, and causing the pushing unit to move forward by the forward movement distance after the rear end is detected and to stop at a position separated from the rear end.

Abstract: A syringe holding structure includes an adapter case (40) for holding a small-diameter syringe, and a syringe holding member having a flange-receiving groove (77) for holing flange portion (46) of the case(40). The syringe holding structure further includes locking mechanism for fixing the flange portion (46) in the groove (77) when the flange portion is inserted into flange-receiving groove and then it is rotated by 90 degrees about its axis.

Abstract: A chemical-liquid injector includes a piston-driving mechanism (130) that moves a piston member of a syringe containing a contrast medium, which includes an actuator and a ram member which is moved back and forth by the actuator, a control circuit (150) which is electrically connected to the actuator, and an operating knob unit (170) which includes an operating knob that is to be operated by an operator, and a rotation sensor that outputs an electric signal corresponding to a rotation of the operating knob. The control circuit is configured to generate a predetermined control signal accordingly, on the basis of a signal from the rotation sensor, and the piston-driving mechanism is operated according to the control signal.

Abstract: A pushing unit is stopped just before abutting against a rear end of a syringe to reliably prevent unwanted extrusion of a chemical liquid from a syringe. An injecting apparatus for injecting a chemical liquid includes: an injection head to which a syringe filled with the chemical liquid is to be mounted; a pushing unit provided on the injection head and pushing a rear end of the syringe; a rear end detection unit provided on the injection head and detecting the rear end in a contactless manner; and a control unit configured to control the injection head, the control unit acquiring a forward movement distance that the pushing unit is to be moved forward after the rear end is detected, and causing the pushing unit to move forward by the forward movement distance after the rear end is detected and to stop at a position separated from the rear end.

Abstract: Syringe adapter 300 has base member 310 and flange lock member 320. Flange lock member 320 is formed in generally arc shape as a whole so as to receive a cylinder flange inside. Flange lock member 320 has look hook 323 and engagement hook 324 formed thereon. Look hook 323 locks the cylinder flange by rotation of a syringe received in flange lock member 320 about its axis. Engagement hook 324 locks syringe adapter 300 to the apparatus so as not to release lock to the apparatus in the state in which the cylinder flange of the syringe is received in flange lock member 320.

Abstract: A chemical liquid injector has syringe adapter 300 removably receiving a cylinder flange formed at a trailing end of cylinder 210 of syringe 200C, 200P, and injection head 110 on which syringe 200C, 200P is mounted with syringe adapter 300 interposed between them. Injection head 110 has adapter receiver 114a opened upward, on which syringe adapter 300 is exchangeably mounted. Syringe adapter 300 has a pair of arm portions located on both sides of left and right of the received cylinder flange and supported to be elastically displaceable so that an interval between the arm portions can be changed.

Abstract: A syringe holding structure includes an adapter case (40) for holding a small-diameter syringe, and a syringe holding member having a flange-receiving groove (77) for holing flange portion (46) of the case(40). The syringe holding structure further includes locking mechanism for fixing the flange portion (46) in the groove (77) when the flange portion is inserted into flange-receiving groove and then it is rotated by 90 degrees about its axis.

Abstract: A chemical liquid injector has syringe adapter 300 removably receiving a cylinder flange formed at a trailing end of cylinder 210 of syringe 200C, 200P, and injection head 110 on which syringe 200C, 200P is mounted with syringe adapter 300 interposed between them. Injection head 110 has adapter receiver 114a opened upward, on which syringe adapter 300 is exchangeably mounted. Syringe adapter 300 has a pair of arm portions located on both sides of left and right of the received cylinder flange and supported to be elastically displaceable so that an interval between the arm portions can be changed.

Abstract: Syringe adapter 300 has base member 310 and flange lock member 320. Flange lock member 320 is formed in generally arc shape as a whole so as to receive a cylinder flange inside. Flange lock member 320 has look hook 323 and engagement hook 324 formed thereon. Look hook 323 locks the cylinder flange by rotation of a syringe received in flange lock member 320 about its axis. Engagement hook 324 locks syringe adapter 300 to the apparatus so as not to release lock to the apparatus in the state in which the cylinder flange of the syringe is received in flange lock member 320.