DICOM Server error when transferring large files

Hello,
I am using the Conquest DICOM Server software to transfer sequences of RAW images. It seems there is a memory limitation or a maximum number of images allowed in the sequence within the server software that causes an error when transferring large amounts of data at one time. I have successfully transferred files with about 200 images, but when transferring a file with 300 images, the dgate.exe process reaches about 650MB in size and then ends, and within the Conquest interface, the server status reports an error: "Client Error: Unknown Command:1 Connection Terminated". I have looked through the documentation and have found no reference to this error, or any limitations of file size. Please let me know if there is a way for me to correct this, or at least if these limitations really exist.

I am using the Windows version of the software on a PC with 2 GB of RAM (recently upgraded from 1 GB).

Thanks for your help,
Alan

Hi Marcel,
Thank you for your reply.

To clarify a little, I am using the Conquest software only on the receiving end of the transfer of the DICOM file. The sending meachine is the x-ray unit that acqires the image sequence. The DICOM objects I am refering to are a single large DICOM file that contains a large amount of images.

Unfortunately I will not be able to provide a sample file, since I am unable to access the data directly on the x-ray unit.

The computer running the Conquest Software has 2GB of RAM currently installed, so I believe that even in this case it should be sufficient to handle the data, even if a copy of the DICOM object is made. The files contain 300 uncompressed images (1024x1024x2) + DICOM header (~630MB).

I have monitored the process's allocated memory, and I see that it reaches about 650MB in size when it stops. This is near the expected file size, so it seems that the file is being completely sent. For smaller files that transfer successfully, it seems the dgate process's memory allocation reaches about the expected file size and slowly decreases as the file is being written to the hard disk.

Also, a side effect of this is once the error occurs, any subsequent file sent from that x-ray unit, of any size, results in the same error, until the Conquest DICOM Server is killed and restarted. I don't know if this information provides any clues.

Cheers,
Alan

Hi Marcel,
No compression or forwarding are being used in the transfer. It should pretty much be a straight forward direct transfer from the x-ray unit to the server computer from what I can tell.

Thanks,
Alan

Hi Marcel,
Following is the header dump from on of the transmitted files (200 images).

Cheers,
Alan

0008,0008 Image Type: ORIGINAL\PRIMARY\SINGLE PLANE\FLUO\ACQ
0008,0016 SOP Class UID: 1.2.840.10008.5.1.4.1.1.12.1
0008,0018 SOP Instance UID: 1.2.392.200036.9116.3.1.21002369.2.0.50080121656835
0008,0020 Study Date: 20070716
0008,0021 Series Date: 20070716
0008,0022 Acquisition Date: 20070716
0008,0023 Image Date: 20070716
0008,0030 Study Time: 155547.312000
0008,0031 Series Time: 190231.734000
0008,0032 Acquisition Time: 190231.734000
0008,0033 Image Time: 190231.734000
0008,0050 Accession Number: 111
0008,0060 Modality: XA
0008,0070 Manufacturer: TOSHIBA_MEC
0008,0080 Institution Name: TOSHIBA
0008,0081 Institution Address: StreetNoStreetCityDistrictZIPCountry
0008,0090 Referring Physician's Name:
0008,1010 Station Name: D0722369
0008,1030 Study Description:
0008,1040 Institutional Department Name: Department
0008,1050 Attending Physician's Name: andreea
0008,1070 Operator's Name: andreea
0008,1090 Manufacturer's Model Name: DFP-8000D
0008,2144 Recommended Display Frame Rate: 20
0010,0010 Patient's Name: andreea doh-a.RSO^andreea doh-a.RSO
0010,0020 Patient ID: RSO Office
0010,0030 Patient's Birth Date: 19760101
0010,0040 Patient's Sex: O
0010,1010 Patient's Age: 031Y
0010,2180 Occupation:
0018,0010 Contrast/Bolus Agent:
0018,0060 kVp: 80
0018,1000 Device Serial Number: 00216923
0018,1020 Software Versions(s): V3.31*R003
0018,1030 Protocol Name: F.M Cardiac
0018,1042 Contrast/Bolus Start Time: 190231.734000
0018,1063 Frame Time: 50
0018,1065 Frame Time Vector: 0\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50\50
0018,1110 Distance Source to Detector: 1000
0018,1111 Distance Source to Patient: 600
0018,1114 ---: 1.6666667
0018,1134 ---: STATIC
0018,1147 Field of View Shape: RECTANGLE
0018,1149 Field of View Dimensions(s): 200\0
0018,1150 Exposure Time: 803
0018,1151 X-ray Tube Current: 38
0018,1154 Average Pulse Width: 4.02
0018,1155 Radiation Setting: SC
0018,115E Image Area Dose Product: 10.1
0018,1164 Imager Pixel Spacing: 0.194\0.194
0018,1500 Positioner Motion: DYNAMIC
0018,1510 Positioner Primary Angle: 0
0018,1511 Positioner Secondary Angle: 0
0018,1520 Positioner Primary Angle Increment: 0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0
0018,1521 Positioner Secondary Angle Increment: 0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0
0020,000D Study Instance UID: 1.2.392.200036.9116.3.1.21002369.4.0.607035731937371
0020,000E Series Instance UID: 1.2.392.200036.9116.3.1.21002369.2.0.5008009308198
0020,0010 Study ID: 4.0.6070356
0020,0011 Series Number: 33
0020,0013 Image Number: 3310000
0020,0020 Patient Orientation:
0020,4000 Image Comments:
0028,0002 Samples per Pixel: 1
0028,0004 Photometric Interpretation: MONOCHROME2
0028,0006 Planar Configuration: 0
0028,0008 Number of Frames: 200
0028,0009 Frame Increment Pointer: e
0028,0010 Rows: 1024
0028,0011 Columns: 1024
0028,0100 Bits Allocated: 16
0028,0101 Bits Stored: 10
0028,0102 High Bit: 9
0028,0103 Pixel Representation: 0
0028,3010 VOI LUT Sequence:
0028,3002 >LUT Descriptor: 1024 0 10
0028,3006 >LUT Data: 0 65 69 73 77 80 84 88 91 95 98 102 106 110 114 117 121 125 129 133 136 139 143 146 150 154 158 161 165 169 172 176 180 183 187 189 193 196 200 203 207 210 214 217 221 224 227 231 233 237 240 243 247 250 253 256 260 263 266 269 272 275 278 281 284 287 290 293 296 299 302 305 308 311 314 316 319 321 324 327 330 333 335 338 341 343 346 349 352 353 356 359 361 364 366 369 371 374 376 379 381 384 386 388 390 393 395 397 400 402 404 407 409 411 413 415 418 419 422 424 426 428 430 432 434 437 439 441 443 445 446 448 450 452 454 456 458 460 462 464 466 468 470 471 473 475 477 478 480 482 484 486 487 489 491 493 494 496 497 499 501 502 504 506 507 509 511 512 514 515 517 518 520 521 523 524 526 527 529 531 532 534 535 536 538 539 540 542 543 545 546 548 549 550 552 553 555 556 557 558 560 561 562 564 565 566 568 569 570 572 573 574 575 576 578 579 580 581 583 584 585 586 587 589 590 591 592 593 594 595 597 598 599 600 601 602 603 605 606 607 608 609 610 611 612 613 614 615 616 618 619 620 621 621 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 653 654 655 656 657 658 659 660 660 661 662 663 664 665 666 667 668 668 669 670 671 672 672 673 674 675 676 677 678 678 679 680 681 682 683 683 684 685 686 687 687 688 689 690 691 691 692 693 694 694 695 696 697 698 698 699 700 701 701 702 703 704 704 705 706 706 707 708 709 709 710 711 712 712 713 714 714 715 716 717 717 718 719 720 720 721 722 722 723 724 724 725 726 726 727 728 728 729 730 731 731 732 733 733 734 735 735 736 737 737 738 739 739 740 741 741 742 742 743 744 744 745 746 747 747 748 748 749 750 750 751 752 752 753 754 754 755 755 756 757 757 758 759 759 760 760 761 762 762 763 763 764 765 765 766 767 767 768 768 769 770 770 771 771 772 773 773 774 774 775 776 776 777 777 778 778 779 780 780 781 781 782 783 783 784 784 785 785 786 787 787 788 788 789 789 790 791 791 792 792 793 793 794 794 795 796 796 797 797 798 799 799 800 800 801 801 802 802 803 803 804 804 805 806 806 807 807 808 808 809 809 810 810 811 811 812 813 813 814 814 815 815 816 816 817 817 818 818 819 819 820 820 821 822 822 822 823 824 824 825 825 826 826 827 827 828 828 829 829 830 830 831 831 832 832 833 833 834 834 835 835 836 836 837 837 838 839 839 840 840 841 841 842 842 843 843 843 844 844 845 845 846 846 847 847 848 848 849 849 850 850 851 851 852 852 853 853 854 854 855 855 856 856 857 857 857 858 858 859 859 860 860 861 861 862 862 863 863 864 864 865 865 866 866 867 867 868 868 869 869 869 870 870 871 871 872 872 873 873 874 874 874 875 875 876 876 877 877 878 878 879 879 880 880 880 881 881 882 882 883 883 884 884 885 885 885 886 886 887 887 888 888 889 889 889 890 890 891 891 892 892 893 893 893 894 894 895 895 896 896 897 897 897 898 898 899 899 900 900 900 901 901 902 902 903 903 904 904 905 905 905 906 906 906 907 907 908 908 909 909 910 910 910 911 911 912 912 913 913 913 914 914 915 915 915 916 916 917 917 918 918 918 919 919 920 920 921 921 921 922 922 923 923 923 924 924 925 925 926 926 926 927 927 928 928 928 929 929 930 930 931 931 931 932 932 933 933 933 934 934 934 935 935 936 936 937 937 938 938 938 939 939 940 940 940 941 941 941 942 942 943 943 943 944 944 945 945 945 946 946 947 947 947 948 948 949 949 949 950 950 951 951 951 952 952 953 953 953 954 954 955 955 955 956 956 956 957 957 958 958 958 959 959 960 960 960 961 961 961 962 962 963 963 963 964 964 965 965 965 966 966 967 967 967 968 968 969 969 969 970 970 970 971 971 971 972 972 973 973 973 974 974 975 975 975 976 976 976 977 977 977 978 978 979 979 979 980 980 981 981 981 982 982 982 983 983 983 984 984 985 985 985 986 986 986 987 987 988 988 988 989 989 989 990 990 990 991 991 992 992 992 993 993 993 994 994 994 995 995 995 996 996 997 997 997 998 998 998 999 999 999 1000 1000 1000 1001 1001 1002 1002 1002 1003 1003 1003 1004 1004 1004 1005 1005 1006 1006 1006 1006 1007 1007 1008 1008 1008 1009 1009 1010 1010 1010 1011 1011 1011 1012 1012 1012 1013 1013 1013 1014 1014 1014 1015 1015 1015 1016 1016 1016 1017 1017 1017 1018 1018 1018 1019 1019 1020 1020 1020 1021 1021 1021 1022 1022 1022 1023 1023
0029,0010 ---: TOSHIBA COMAPL HEADER
0029,1031 ---: 4.0.7021950
0029,1034 ---: DB TO DICOM
0032,000A Study Status ID: COMPLETED
0032,000C Study Priority ID:
7079,0010 ---: TOSHIBA_MEC_XA3
7079,1021 ---: F\ORIGINAL\UNSUB\CARDIAC\IA-DSA
7079,1022 ---: 200\200
7079,1026 ---: 0.1164\0.1164
7079,102A ---:

7079,102C ---: OFF\OFF\OFF
7079,102E ---: ONE-BEAT
7079,102F ---: MASK-SECT
7079,1032 ---: OFF\OFF
7079,1035 ---: FULL\INVL
7079,1036 ---: CIRCLE\CIRCLE
7079,1037 ---: d d
7079,103C ---: 1.2\1
7079,1040 ---: SUB\SUB
7079,1047 ---: K $-3õ½ õ½ õ½ K õ½ K õ½ õ½ õ½ K õ½
7079,1048 ---:






7079,1049 ---:
7079,104B ---: F-REC\Unknown Para Version\DDCF
7079,104D ---: OFF\OFF\ON
7079,104F ---: OFF\OFF\OFF
7079,1054 ---: W K $-3õ½
7079,1073 ---: $-3õ½õ½
7079,1080 ---: FPD802
7FE0,0010 Pixel Data: 6824

Hi Marcel,
I was just wondering if there is an update on the issue I was having. Is anything apparent from the header information I posted?? Thanks,

Alan

Hi Marcel,
Thanks for the update, and thank you very much for looking into the problem.

Cheers,
Alan