1. An apparatus comprising:
a memory having stored therein machine limitations information as regards a radiation-treatment delivery apparatus and target motion boundary information as regards a volume within which a radiation target may possibly move during a radiation treatment session via the radiation-treatment delivery apparatus;
a control circuit operably coupled to the memory and configured to act with respect to a radiation treatment plan based on at least one of the machine limitations information and the target motion boundary information.
2. The apparatus of claim 1 wherein the machine limitations information comprises information regarding at least one of:
range of motion for a multi-leaf collimator; and
range of motion for a pair of collimating jaws.
3. The apparatus of claim 2 wherein the machine limitations information comprises information regarding both of:
range of motion for a multi-leaf collimator; and
range of motion for a pair of collimating jaws.
4. The apparatus of claim 1 wherein the machine limitations information represents machine limitations at each of a plurality of fields along a radiation-treatment arc.
5. The apparatus of claim 1 wherein the target motion boundary information represents target motion boundaries for the volume at each of a plurality of fields along a radiation-treatment arc.
6. The apparatus of claim 1 wherein the target motion boundary information comprises information specific to a particular patient for whom the radiation treatment plan is being developed.
7. The apparatus of claim 6 wherein the target motion boundary information comprises information developed, at least in part, by tracking radio-frequency transducers implanted within the particular patient.
8. The apparatus of claim 1 wherein the control circuit is configured to combine the machine limitations information with the target motion boundary information by, at least in part, simultaneously presenting the machine limitations information in combination with the target motion boundary information in a beam’s-eye view display.
9. The apparatus of claim 8 wherein the control circuit is further configured to simultaneously present the machine limitations information in combination with the target motion boundary information in a beam’s-eye view display by, at least in part, simultaneously presenting the machine limitations information in combination with the target motion boundary information in a beam’s-eye view display at each of a plurality of fields along a radiation-treatment arc.
10. The apparatus of claim 1 wherein the control circuit is further configured to:
provide an automatic warning when the machine limitations information conflicts with the target motion boundary information.
11. The apparatus of claim 10 wherein the control circuit is further configured to provide an automatic warning when the machine limitations information conflicts with the target motion boundary information at any of a plurality of fields along a radiation-treatment arc.
12. The apparatus of claim 1 wherein the control circuit is configured to combine the machine limitations information with the target motion boundary information when developing a radiation treatment plan in order to use that information to make adjustments to the radiation treatment plan.
13. The apparatus of claim 12 wherein the control circuit is configured to make the adjustments to the radiation treatment plan by adjusting at least one of:
a radiation treatment machine isocenter position;
a collimator angle;
a field angle;
a collimator jaw position; and
at least one multi-leaf collimator leaf position.
14. A method comprising:
by a control circuit:
accessing a memory having stored therein machine limitations information as regards a radiation-treatment delivery apparatus and target motion boundary information as regards a volume within which a radiation target may possibly move during a radiation treatment session via the radiation-treatment delivery apparatus;
combining the machine limitations information with the target motion boundary information when acting with respect to a radiation treatment plan.
15. The method of claim 14 wherein the machine limitations information comprises information regarding at least one of:
range of motion for a multi-leaf collimator; and
range of motion for a pair of collimating jaws.
16. The method of claim 14 wherein the machine limitations information represents machine limitations at each of a plurality of fields along a radiation-treatment arc.
17. The method of claim 14 wherein the target motion boundary information represents target motion boundaries for the volume at each of a plurality of fields along a radiation-treatment arc.
18. The method of claim 14 wherein combining the machine limitations information with the target motion boundary information comprises, at least in part, simultaneously presenting the machine limitations information in combination with the target motion boundary information in a beam’s-eye view display.
19. The method of claim 18 wherein simultaneously presenting the machine limitations information in combination with the target motion boundary information in a beam’s-eye view display comprises, at least in part, simultaneously presenting the machine limitations information in combination with the target motion boundary information in a beam’s-eye view display at each of a plurality of fields along a radiation-treatment arc.
20. The method of claim 14 further comprising:
providing an automatic warning when the machine limitations information conflicts with the target motion boundary information.
21. The method of claim 20 wherein providing an automatic warning when the machine limitations information conflicts with the target motion boundary information comprises providing the automatic warning when the machine limitations information conflicts with the target motion boundary information at any of a plurality of fields along a radiation-treatment arc.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A medium-pressure hydrocracking process, comprising the steps of contacting feed oil with a hydrocracking catalyst in a hydrocracking system under a medium pressure and hydrocracking conditions; separating the hydrocraking reaction product into a vapor fraction which is recycled to the hydrocracking system as recycling hydrogen, and a liquid fraction which is further separated in a separation system to produce distillates including jet fuel andor diesel (hereinafter referred to as hydrocracked jet fuel andor diesel) cuts; feeding a part or all of the hydrocracked jet fuel andor diesel cuts into a hydrosaturation system where the cuts come into contact with a hydrosaturation catalyst and react with fresh hydrogen under hydrosaturation conditions; separating the hydrosaturation reaction product into a hydrogen-containing vapor which enters into the hydrocracking system as make-up hydrogen, and jet fuel andor diesel (hereinafter referred to as the hydrosaturated jet fuel andor diesel) which enter into a separation system for processing.
2. The process according to claim 1, wherein a part or all of the hydrocracked jet fuel cut enters into a hydrosaturation system for processing.
3. The process according to claim 1, wherein a part or all of the hydrocracked diesel cut enters into a hydrosaturation system for processing.
4. The process according to claim 1, wherein a part or all of the hydrocracked jet fuel and diesel cuts enter into a hydrosaturation system for processing.
5. The process according to claim 1, wherein all of the hydrocracked jet fuel andor diesel cuts enter into a hydrosaturation system for processing, and the hydrosaturated jet fuel andor diesel enter into an individual separation system for processing, which then separately leaves the equipment as products.
6. The process according to claim 1, wherein a part of the hydrocracked jet fuel andor diesel cuts enter into a hydrosaturation system for processing, and the hydrosaturated jet fuel andor diesel cuts enter into an individual separation system for processing, which then mixes with the other part of the corresponding hydrocracked jet fuel andor diesel cuts and separately leaves the equipment as products.
7. The process according to claim 1, wherein both the liquid fraction of the hydrocracking reaction product and the hydrosaturated jet fuel andor diesel enter the same separation system for fractionation together, and a part of the separated jet fuel andor diesel cuts enter into the hydrosaturation system for processing, and the remainder leaves the equipment as products.
8. The process according to claim 1, wherein said hydrosaturation catalyst is a reduced catalyst with one or more metals of Groups VIB andor VIII of the Periodic Table as the hydrogenation components.
9. The process according to claim 1, wherein the hydrocracking reaction is carried out under a pressure of 4.0-10.0 MPa, at a temperature of 360-400 C., with a hydrogenoil volume ratio of 800:1-1500:1 and a liquid hourly volume space velocity of 0.5-1.5 h1.
10. The process according to claim 1, wherein the hydrosaturation reaction is carried out under a pressure of 0.5-3.0 MPa, at a temperature of 100-280 C., with a hydrogenoil volume ratio of 200:1-1000:1, and a liquid hourly volume space velocity of 1.0-6.0 h31 1.
11. The process according to claim 1, wherein said fresh hydrogen comes from a hydrogen-production system or the pipe net of the refinery and contains no such impurities as H2S and NH3, which is used directly in the process without being additionally pressurized.
12. The process according to claim 8, wherein said one or more metals isare selected from the group consisting of Pt, Ni, and Pd.
13. The process according to claim 9, wherein said pressure is 4.0-8.0 MPa.
14. The process according to claim 10, wherein said temperature is 100-250 C., and said pressure is 1.0-2.0 MPa.
15. The process according to claim 7, wherein the weight ratio of said jet fuel andor diesel distillate entering into the hydrosaturation system to those leaving the system as jet fuel andor diesel products is 1:6-6:1.