1. A computed tomography imaging machine comprising:
a radiation source (16, 18) providing a radiation beam divisible into regions (30) being individually controllable in intensity;
a radiation detector (28) for detecting the radiation from the radiation beam to produce attenuation signals;
a patient support (22) supporting a patient between the radiation source and radiation detector; and
a controller (40) holding a stored model (53) of the patient and controlling the intensities of the radiation beam in the different regions based on a contribution (60) by the radiation of the regions to a quality of a tomographic image as determined from the stored model.
2. The computed tomography imaging machine of claim 1 wherein calculation of the intensity of the radiation beam in the different regions is performed by an inverse calculation in which intensities (43) are iteratively modified (56) based on a comparison of a calculated image (59) using the intensities applied to the stored model (53) in comparison (57) to the stored model itself.
3. The computed tomography imaging machine of claim 1 wherein the intensity of the radiation beam in the regions is controlled to reduce dose to the patient for a given image quality.
4. The computed tomography imaging machine of claim 1 wherein the stored model is a tomographic image (44) of the patient.
5. The computed tomography imaging machine of claim 4 wherein the tomographic image is a previous image of the patient provided by the computed tomography imaging machine.
6. The computed tomography imaging machine of claim 5 wherein the previous image is obtained when the controller is controlling the intensity of the regions of the radiation beam.
7. The computed tomography imaging machine of claim 1 wherein the radiation source is selected from the group consisting of kilovoltage x-ray sources and megavoltage x-ray sources.
8. The computed tomography imaging machine of claim 1 wherein the radiation source includes a multi-leaf collimator (32) providing a plurality of leaves moving into and out of the radiation beam to control the intensity within the regions, wherein at least one leaf is associated with each region.
9. The computed tomography machine of claim 1 wherein the radiation source includes opposing shutter blades (34) moving across multiple regions to control the intensity within the regions.
10. The computed tomography imaging machine of claim 1 wherein the controller controls the intensity of the radiation beams in the regions assuming a subset (58) of regions of predetermined intensity.
11. The computed tomography imaging machine of claim 10 wherein the subset of regions of given intensity are obtained from a radiation therapy treatment plan.
12. The computed tomography imaging machine of claim 1 wherein the intensities are controlled to only an on or off state.
13. The computed tomography imaging machine of claim 1 wherein the intensities are controlled among a range of intensity values.
14. The computed tomography imaging machine of claim 1 wherein the computed tomography imaging machine includes multiple radiation sources (16, 18) and wherein the radiation beam is provided by no less than one radiation source.
15. The computed tomography imaging machine of claim 1 wherein the controller further reconstructs (66) a tomographic image from the attenuation signals from the controlled intensity radiation beams (68) after augmenting (70) the attenuation signals with information from the model (63).
16. A method of low dose tomographic imaging comprising:
(a) providing a stored model (53) of a patient being imaged;
(b) based on the stored model, controlling intensities of different of regions (30) within a radiation beam directed toward the patient (62) based on a calculated contribution (57) by the radiation of the regions to a quality of a tomographic image of the patient; and
(c) reconstructing (66) an image of the patient using attenuation data collected at a detector (28) receiving the radiation beam after passage through the patient.
17. The method of claim 16 wherein the intensities of the different regions are determined by inverse modeling (56, 53, 59, 57, 60) of beam intensities based on the model.
18. The method of claim 16 wherein the intensities of the radiation beam in the regions are controlled to reduce dose to the patient for a given image quality.
19. The method of claim 16 wherein the stored model is a tomographic image (44) of the patient.
20. The method of claim 19 including the step of acquiring a series of multiple images and wherein the tomographic image is a previous image of the patient in the series.
21. The method of claim 20 wherein the previous image is obtained while controlling intensities of different of regions.
22. The method of claim 16 wherein the radiation beam is of an energy selected from the group consisting of: kilovoltage x-rays and megavoltage x-ray sources.
23. The method of claim 16 wherein the step of controlling intensities assumes predetermined intensities (58) for a subset of the regions.
24. The method of claim 23 wherein the subset of regions of given intensity are obtained from a radiation therapy treatment plan.
25. The method of claim 16 wherein the intensities are controlled to on or off states.
26. The method of claim 16 wherein the intensities are controlled among a range of values.
27. The method of claim 16 wherein the step of reconstructing (66) reconstructs a tomographic image from the attenuation data after augmenting (70) the attenuation data with information from the stored model.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus suitable for supporting a fishing rod and reel above a frozen surface of water having an ice fishing hole, the apparatus removably attachable to an elevated portion of a transportable support member, the apparatus comprising:
an elongated arm having an inner end, an outer end, a top, a bottom and a side, with the inner end of the elongated arm removably mountable to the elevated portion of the transportable support member so that the bottom is spaced above the frozen surface of water;
a holder connected adjacent to the side of the elongated arm and adjacent the outer end thereof, the holder having an elongated fishing rod support portion, a first end, a second end and a longitudinal axis, wherein the fishing rod support portion receives and substantially encircles a segment of an elongated fishing rod as the fishing rod is initially brought into substantial alignment with the longitudinal axis of the holder and then moved towards the longitudinal axis of the holder from a direction that is substantially transverse to the longitudinal axis until the fishing rod segment contacts an inner surface of the fishing rod support portion and portions of the fishing rod extend beyond the first and second ends of the fishing rod support portion;
an alarm finger having a first end and a second end that define a length therebetween, with the first end fixedly attached to the elongated arm adjacent the holder, and with the second end operably biased for movement from a first position to a second position;
an audible alarm device operatively connected to and movable with the alarm finger, the audible alarm device actuated by movement of the alarm finger as said alarm finger moves between the first and second positions; and
a fishing line engagement member, with the fishing line engagement member having a first end and a second end that define a second length therebetween that is less than the length of the alarm finger, the fishing line engagement member fixedly connected to the alarm finger so that the fishing line engagement member is in substantial linear alignment with the alarm finger when the alarm finger is in the second position, the fishing line engagement member configured to be able to initiate movement of the alarm finger to the first position in reaction to a first pulling force on a line of a reel supported on a rod supported by the holder in response to a fish strike, the engagement member operatively associated with the alarm finger so as to be able to initiate movement of the alarm finger to the second position in reaction to a second, greater pulling force on the line, whereby the audible alarm device will sound when a fish strikes.
2. The apparatus of claim 1, wherein the holder is a sleeve.
3. The apparatus of claim 2, wherein the holder includes a longitudinal slot extending an entire length thereof from the first end to the second end.
4. The apparatus of claim 3, wherein first and second ends of the longitudinal slot have different widths.
5. The apparatus of claim 1, wherein the fishing line engagement member is a substantially cylindrically shaped stem.
6. The apparatus of claim 1, wherein the line of the reel supported on the rod that is supported by the rod holder operatively contacts the engagement member.
7. The apparatus of claim 1, wherein the holder is oriented so that it is coincident with a substantially vertical plane, and wherein the holder is movably adjustable relative to the elongated arm.
8. The apparatus of claim 1, wherein the inner end of the elongated arm includes an aperture that extends from the top to the bottom, wherein the aperture is configured to receive a vertically oriented bolt that is operatively connected to the elevated portion of the transportable support member, with the bolt supporting and positioning the elongated arm above the frozen surface of water.
9. The apparatus of claim 1, wherein the alarm finger comprises a spring element.
10. A holder for supporting a rod and reel for ice fishing, the holder removably attachable to an elevated portion of a support member, the holder comprising:
an elongated arm comprising a body having an inner end, an outer end, a top, a bottom, a first side and a second side, with the inner end of the elongated arm removably mountable to the elevated portion of the support member;
a tubular, rod receiving sleeve pivotally mounted at the first side of the body and near the outer end thereof, with the rod receiving sleeve configured to support a rod and reel adjacent the first side of the body, and with the rod receiving sleeve positionable so that a first portion of the rod receiving sleeve extends vertically above the top of the body and a second portion of the rod receiving sleeve extends vertically below the bottom of the body when the elongated arm is mounted to the elevated portion of the support member;
a generally vertically oriented alarm finger having a first end and a second end that define a length therebetween, with the first end attached to the body and with the second end movable between a first position for detecting a strike of a fish, and a second, tripped position;
an audible alarm device positioned to be actuated by movement of the alarm finger between the first and second positions; and
a fishing line engagement member, with the fishing line engagement member having a first end and a second end that define a second length therebetween, with the second length being less than the length of the alarm finger, with the first end of the fishing line engagement member fixedly connected to the alarm finger and with the second end of the fishing line engagement member configured so as to be able to actuate the movement of the alarm finger from the first position to the second position upon an initiation of a pulling force on a fishing line of the rod and reel supported by the rod receiving sleeve when the fishing line is engaged with the fishing line engagement member, whereby the audible alarm device will sound when a fish strikes.
11. The holder of claim 10, wherein the tubular, rod receiving sleeve comprises a longitudinal slot extending along an entire length thereof, with the slot configured to admit passage of a portion of the rod as the rod is moved in a generally transverse direction relative to the tubular rod receiving sleeve.
12. The holder of claim 11, wherein one end of the longitudinal slot includes a widened section.
13. The holder of claim 10, wherein the tubular, rod receiving sleeve supports a rod and reel such that a tip of the rod is lower than a handle of the rod.
14. The holder of claim 10, further comprising a mounting bracket that is removably attachable to the elevated portion of the support member, wherein the arm is swingably attached to the mounting bracket near the inner end thereof for adjustable, swinging movement in a horizontal plane.
15. The holder of claim 14, wherein the rod receiving sleeve is mounted to the first side of the body for pivotal movement in a vertical plane.
16. The holder of claim 14, wherein the alarm finger is attached to the body adjacent to the outer end of the arm.
17. The holder of claim 10, wherein the alarm finger comprises a spring element having a free end at said second end of said alarm finger, and wherein the free end of the spring element carries the audible alarm device.
18. The holder of claim 17, wherein the fishing line engagement member comprises a stem member connected to the free end of the spring element so that the stem member is generally vertically oriented with respect to the spring element when the spring element is in the second, tripped position, whereby a fishing line dispensed from a reel of a rod and reel assembly removably supported by the rod receiving sleeve can be engaged around the stem member to move the alarm finger to the first position where it is held by the weight of the lure on the fishing line until a fish strikes and pulls the line off of the stem member for release of the alarm finger to the second, tripped position.
19. The holder of claim 17, wherein the audible alarm device comprises a bell that is removably attached to the free end of the coil spring element.
20. The holder of claim 17, wherein the spring element is a coil spring.
21. The holder of claim 10, wherein the audible alarm device comprises a bell carried on the alarm finger.
22. The holder of claim 21, wherein the bell is removably secured to the alarm finger by an attachment tab.
23. The holder of claim 10, wherein the tubular, rod receiving sleeve only engages a forwardly facing surface of an attachment stem of a reel attached to a rod, and a portion of a rod handle that extends between the attachment stem of the reel and a tip of the rod.
24. The holder of claim 10, wherein the tubular, rod receiving sleeve does not engage a hand grip portion of a fishing rod handle that is located to a rear of a reel attached thereto.
25. The holder of claim 10, wherein the tubular, rod receiving sleeve is adjustably positionable relative to the arm.
26. The holder of claim 10, wherein the fishing line engagement member comprises a substantially linear stem having said second length which is a predetermined length, and wherein the stem has a consistent cross-sectional area along said predetermined length.
27. A holder, attachable to an elevated portion of a transportable support member, the holder suitable for use in supporting a fishing rod and reel for ice fishing, the holder comprising:
an elongated arm having an inner end, an outer end, a top, a bottom, a first side and a second side, with the inner end of the arm constructed and arranged to be removably mounted to the elevated portion of the transportable support member;
a rod receiving sleeve having a fishing rod support portion with first and second ends and a longitudinal slot extending an entire length thereof from the first end to the second end, the sleeve pivotally mounted to the first side of the arm adjacent the outer end of the elongated arm, with the rod receiving sleeve positionable so that the first end extends above the top and so that the second end extends below the bottom;
an alarm finger having a first end and a second end, with the first and second ends defining a length therebetween, with the first end attached to the elongated arm adjacent the rod receiving sleeve, and with the second end of the alarm finger movably biased from a first position that is generally horizontally oriented to a second position that is generally vertically oriented;
an audible alarm device attached to the second end of the alarm finger and movable therewith as the second end of the alarm finger moves between the first and second positions, the audible alarm device actuated by the alarm finger as said alarm finger moves between the first and second positions; and
a fishing line engagement member, with the fishing line engagement member having a first end and a second end that define a second length therebetween that is less than the length of the alarm finger, the fishing line engagement member fixedly connected to the alarm finger and movable therewith, the engagement member configured to slidingly contact a line of a reel supported on a rod that is positioned in the rod receiving sleeve, wherein a small force exerted by a fish on the line exerts a downward force on the engagement member and will cause the alarm finger to be moved towards the first position, and wherein a larger force exerted by a fish on the line will cause the line to slidingly disengage from the engagement member so that the alarm finger moves towards the second position, thereby actuating the audible alarm device.
28. The holder of claim 27, wherein the longitudinal slot has a first width at the first end of the rod receiving sleeve, and a second width at the second end of the rod receiving sleeve, and wherein the first width is different than the second width.